ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2017

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TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 001-34091

MARKETAXESS HOLDINGS INC.

(Exact name of registrant as specified in its charter)

Delaware

52-2230784

(State of incorporation)

(IRS Employer

Identification No.)

299 Park Avenue, New York, New York

10171

(Address of principal executive offices)

(Zip Code)

(212) 813-6000

(Registrant’s telephone number, including area code)

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

Title of each class:

Name of each exchange on which registered:

Common Stock, par value $0.003 per share

NASDAQ Global Select Market

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☑ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ☐ No ☑

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☑ No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☑ No ☐

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer

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Accelerated filer

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Non-accelerated filer

☐ (Do not check if a smaller reporting company)

Smaller reporting company

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Emerging growth company

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If an emerging growth company, indication by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☑

The aggregate market value of the shares of common stock held by non-affiliates of the registrant as of June 30, 2017 (the last business day of the registrant’s most recently completed second fiscal quarter) was approximately $7.3 billion computed by reference to the last reported sale price on the NASDAQ Global Select Market on that date. For purposes of this calculation, affiliates are considered to be officers, directors and holders of 10% or more of the outstanding common stock of the registrant on that date. The registrant had 37,554,123 shares of common stock, 1,065,659 of which were held by affiliates, outstanding on that date.

As of February 16, 2018, the aggregate number of shares of the registrant’s common stock outstanding was 37,629,246.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement for the 2018 Annual Meeting of Stockholders are incorporated by reference into Items 10, 11, 12, 13 and 14 of Part III of this Form 10-K/A.

EXPLANATORY NOTE

This Amendment No. 1 on Form 10-K/A (the “Amendment”) amends the Annual Report on Form 10-K of MarketAxess Holdings Inc. for the fiscal year ended December 31, 2017, as filed with the Securities and Exchange Commission on February 21, 2018 (the “Original Filing”).

MarketAxess Holdings Inc. is filing this Amendment for the sole purpose of inserting the conformed signature of our independent registered public accounting firm on their Report of Independent Registered Public Accounting Firm with respect to the audited financial statements included in the Original Filing which was inadvertently omitted. Accordingly, Item 8 of Part II of the Original Filing is being amended hereby solely to reflect this conformed signature.

In accordance with Rule 12b-15 of the Securities Exchange Act of 1934, as amended, this Amendment includes new certifications required by Sections 302 and 906 of the Sarbanes-Oxley Act of 2002, as amended, dated as of the filing date of this Amendment. In addition, the consent filed as Exhibit 23.1 to this Amendment is dated as of the filing date of this Amendment.

No other changes were made to the Original Filing. For ease of reference, the entire Form 10-K, including all other exhibits filed therewith, is included with this Amendment.

This report contains certain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements may be identified by words such as “expects,” “intends,” “anticipates,” “plans,” “believes,” “seeks,” “estimates,” “will,” or words of similar meaning and include, but are not limited to, statements regarding the outlook for our future business and financial performance. Forward-looking statements are based on management’s current expectations and assumptions, which are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict. It is routine for our internal projections and expectations to change as the year or each quarter in the year progresses, and therefore it should be clearly understood that the internal projections and beliefs upon which we base our expectations may change prior to the end of each quarter or the year. Although these expectations may change, we are under no obligation to revise or update any forward-looking statements contained in this report. Our company policy is generally to provide our expectations only once per quarter, and not to update that information until the next quarter. Actual future events or results may differ, perhaps materially, from those contained in the projections or forward-looking statements. Factors that could cause or contribute to such differences include those discussed below and elsewhere in this report, particularly in Item 1A. “Risk Factors.”

Item 1. Business.

MarketAxess Holdings Inc. (the “Company” or “MarketAxess”) operates a leading electronic trading platform that enables fixed-income market participants to efficiently trade corporate bonds and other types of fixed-income instruments using our patented trading technology. Over 1,300 institutional investor and broker-dealer firms are active users of our trading platform, accessing global liquidity in U.S. high-grade corporate bonds, emerging markets and high-yield bonds, European bonds, U.S. agency bonds, municipal bonds, credit default swaps and other fixed-income securities. Through our Open Trading™ protocols, we execute trades in certain bonds between and among institutional investor and broker-dealer clients in an all-to-all trading environment on a matched principal basis. We also offer a number of trading-related products and services, including: market data to assist clients with trading decisions; connectivity solutions that facilitate straight-through processing; technology services to optimize trading environments; and execution services for exchange-traded fund managers and other clients. Through our Trax® division, we also offer a range of pre- and post-trade services, including trade matching, trade publication, regulatory transaction reporting, and market and reference data across a range of fixed-income and other products.

Our platform’s innovative technology solutions are designed to increase the number of potential trading counterparties on our electronic trading platform and create a menu of solutions to address different trade sizes and bond liquidity characteristics. Our traditional request-for-quote model allows our institutional investor clients to simultaneously request competing, executable bids or offers from our broker-dealer clients and execute trades with the broker-dealer of their choice from among those that choose to respond. Our Open Trading™ protocols complement our request-for-quote model by increasing the number of potential counterparties and improving liquidity by allowing all participants to interact anonymously in an all-to-all trading environment. Our platform also provides our broker-dealer clients a solution that enables them to efficiently reach our institutional investor clients for the distribution and trading of bonds.

Traditionally, bond trading has been a manual process, with product and price discovery conducted over the telephone between two or more parties. This traditional process has a number of shortcomings resulting primarily from the lack of a central trading facility for fixed-income securities, which makes it difficult to matchbuyers and sellers for particular issues. Many market participants also use e-mail and other electronic means of communication for trading these securities. While electronic communication methods have addressed some of the limitations associated with traditional bond trading methods, we believe that the process is still hindered by limited liquidity, limited price transparency, significant transaction costs, compliance and regulatory challenges, and difficulty in executing numerous trades at one time.

Our disclosed multi-dealer Request For Quote (“RFQ”) trading functionality addresses many of the remaining shortcomings that result from trading bonds over the telephone or via e-mail. Through our RFQ trading protocols, our institutional investor clients can determine prices available for a security, a process called price discovery, and then trade those securities directly with our broker-dealer clients. The price discovery process includes the ability to view indicative prices from the broker-dealer clients’ inventory available on our platform, access to real-time pricing information and analytical tools (including spread-to-Treasury data, search capabilities and independent third-party credit research) available on our BondTicker® service and the ability to request executable bids and offers simultaneously from all of our participating broker-dealer clients during the trade process. On average, institutional investor clients receive several bids or offers from broker-dealer clients in response to trade inquiries. However, some trade inquiries may not receive any bids or offers.

Our services relating to trade execution include single and multiple-dealer inquiries; list trading, which is the ability to request bids and offers on multiple bonds at the same time; and swap trading, which is the ability to request an offer to purchase one bond and

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a bid to sell another bond, in a manner such that the two trades will be executed simultaneously, with payment based on the price differential of the bonds. Once a trade is completed on our platform, the broker-dealer client and institutional investor client may settle the trade with the assistance of our automated post-trade messaging, which facilitates the communication of trade acknowledgment and allocation information between our institutional investor and broker-dealer clients.

We are not a party to any of the disclosed trades that occur on our platform between institutional investor clients and broker-dealer clients; rather, we serve as an intermediary between broker-dealers and institutional investors, enabling them to meet, agree on a price and then transact directly with each other. However, in connection with our Open Trading™ protocols, we execute bond transactions between and among institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller in matching back-to-back trades which are then settled through a third-party clearing broker. In 2017, 15.9% of all MarketAxess platform volume was executed via Open Trading™ protocols, up from 13.2% in the 2016.

According to the Securities Industry and Financial Markets Association (“SIFMA”), outstanding U.S. high-grade corporate bond debt has increased approximately 24.9% from year-end 2012 to September 30, 2017, the most recent date available. During this same period, financial market regulators have implemented increased capital requirements for bank-owned broker-dealers holding corporate bond inventory. As a result, corporate bond debt owned by institutional investors has increased, while the available base of capital for dealer market making has declined. Partly as a result of these trends, overall secondary turnover as a percentage of corporate debt outstanding has been falling, causing all market participants to look for new electronic trading solutions to improve liquidity and turnover. We have responded with a series of Open TradingTM protocols designed to allow our broker-dealer and institutional investor clients to interact in an all-to-all trading environment. During 2017, over 700 participating client firms provided liquidity via our Open Trading™ solutions and we completed approximately 628,000 Open Trading™ trades, an increase of 53.9% compared to 2016.

Our broker-dealer clients accounted for approximately 97% of the underwriting of newly-issued U.S. corporate bonds and approximately 82% of the underwriting of newly issued European corporate bonds in 2017. We believe these broker-dealers also represent the principal source of secondary market liquidity in the markets in which we operate. Secondary market liquidity refers to the ability of market participants to buy or sell a security quickly and in large volume subsequent to the original issuance of the security, without substantially affecting the price of the security. In addition to trading fixed-income securities by traditional means, including the telephone and e-mail, our broker-dealer clients use proprietary single-dealer systems and other trading platforms, as well as our electronic trading platform. We believe that the traditional means of trading remain the manner in which the majority of bond volume is traded between institutional investors and broker-dealers.

In 2017, our volume in U.S. high-grade corporate bonds represented approximately 16.9% of the total estimated U.S. high-grade corporate bond volume, as reported by the Financial Industry Regulatory Authority (“FINRA”) Trade Reporting and Compliance Engine (“TRACE”). TRACE facilitates the mandatory reporting of over-the-counter (“OTC”) secondary market transactions in eligible fixed-income securities in the U.S., including trading between institutional investors and broker-dealers, as well as inter-dealer and retail trading. All broker-dealers that are FINRA member firms have an obligation to report transactions in corporate bonds to TRACE under a set of rules approved by the Securities and Exchange Commission (“SEC”).

Through our Trax® brand,we provide trade matching and regulatory transaction reporting services for European investment firms and market and reference data across a range of fixed-income products. In response to the pre-and post-trade transparency mandates from the recast Markets in Financial Instruments Directive (“MiFID II”) in Europe, Trax® has been authorized by the UK Financial Conduct Authority (“FCA”) as an Approved Publication Arrangement (“APA”) and an Approved Reporting Mechanism (“ARM”). In addition to its APA and ARM reporting services, Trax® has developed a comprehensive suite of value-add solutions for MiFID II, including pre trade transparency services, systematic internaliser (“SI”) determination and monitoring, best execution reporting, commodity position reporting, data quality analysis and peer benchmarking.

In 2017, 89.4% of our revenues were derived from commissions for trades executed on our platform and distribution fees that are billed to our broker-dealer clients on a monthly basis. We also derive revenues from information services, post-trade services, investment income and other income. Our expenses consist of employee compensation and benefits, depreciation and amortization, technology and communication expenses, professional and consulting fees, occupancy, marketing and advertising, clearing costs and other general and administrative expenses.

Industry Background

Fixed-income securities are issued by corporations, governments and other entities, and pay a pre-set absolute or relative rate of return. As of September 30, 2017, the most recent date available, there were approximately $40.3 trillion principal amount of fixed-income securities outstanding in the U.S. market, including $8.8 trillion principal amount of U.S. corporate bonds, according to SIFMA. The estimated average daily trading volume of U.S. corporate bonds, as measured by TRACE, was $27.8 billion in 2017.

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Primary dealer holdings of U.S. corporate bonds (investment-grade and high-yield) as reported by the Federal Reserve Bank of New York were $12.6 billion as of December 31, 2017. This represents less than one day of trading volume as measured by TRACE.

U.S. High-Grade Corporate Bond Market

The U.S. corporate bond market consists of three broad categories of securities: investment-grade debt (so-called “high-grade”), which typically refers to debt rated BBB- or better by Standard & Poor’s or Baa3 or better by Moody’s Investor Service; debt rated below investment-grade (so-called “high-yield”), which typically refers to debt rated lower than BBB- by Standard & Poor’s or Baa3 by Moody’s Investor Service; and debt convertible into equity (so-called “convertible debt”). We use the terms high-grade debt and investment-grade debt interchangeably in this Annual Report on Form 10-K.

The U.S. high-grade corporate bond market represents the largest subset of the U.S. corporate bond market. FINRA includes over 60,000 unique securities in the list of TRACE-eligible bonds, representing the majority of the daily trading volume of high-grade bonds. According to SIFMA, U.S. high-grade corporate bond debt outstanding has increased approximately 24.9% from $7.0 trillion at year-end 2012 to $8.8 trillion at September 30, 2017. Over the last five years, high-grade corporate bond issuance was over $1.0 trillion each year, exceeding pre-financial crisis levels. Notwithstanding the growth in the total amount of debt outstanding, turnover (which is the total amount traded as a percentage of the amount outstanding for the bonds that traded) is below credit-crisis lows. The trading volume of U.S. high-grade corporate bonds as reported by TRACE increased to approximately $4.9 trillion for the year ended December 31, 2017, compared to $4.6 trillion and $4.0 trillion for the years ended December 31, 2016 and 2015, respectively. We believe that the low level of turnover is an indicator of liquidity challenges in the credit markets.

Prior to regulatory reforms such as Basel III and regulations under The Dodd–Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”), dealer balance sheets were relatively elastic, so dealers were able to facilitate trading in most fixed-income products without dramatic price moves. The regulatory reforms enacted after the global financial crisis resulted in greater capital and liquidity requirements for dealers, which impacted market liquidity and diminished risk appetite by market intermediaries. The Volcker Rule, which limits proprietary trading by banks, has also had an impact on dealer inventories and the ability of dealers to act as market-makers. As a result, we believe market participants require new solutions to increase liquidity and we have responded with our Open Trading™ protocols, designed to increase the number of potential trading counterparties on our electronic trading platform by allowing our broker-dealer and institutional investor clients to interact in an all-to-all trading environment.

Emerging Markets Bond Market

We define the emerging markets bond market generally to include U.S. dollar, Euro or local currency denominated bonds issued by sovereign entities or corporations domiciled in a developing country. These issuers are typically located in Latin America, Asia, or Central and Eastern Europe. Examples of countries we classify as emerging markets include: Argentina, Brazil, Colombia, Mexico, Peru, the Philippines, Russia, Turkey and Venezuela.

The institutional investor base for emerging markets bonds includes many crossover investors from the high-yield and high-grade investment areas. Institutional investors have been drawn to emerging markets bonds by their high returns and high growth potential. The average daily trading volume of emerging markets debt, as reported by the Emerging Markets Trade Association for the quarter ended September 30, 2017, the most recent date available, was $10.2 billion of external markets debt and $11.7 billion of local markets debt.

U.S. Crossover and High-Yield Bond Market

We define the high-yield bond market generally to include all debt rated lower than BBB- by Standard & Poor’s or Baa3 by Moody’s Investor Service. We define the crossover market to include any debt issue rated below investment-grade by one agency but investment-grade by the other. The total amount of high-yield corporate bonds yearly issuance as reported by SIFMA increased by 18.9% to $284.9 billion in 2017 from $239.6 billion in 2016, primarily due to increased global demand for higher yielding debt. The average daily trading volume of high-yield bonds as measured by TRACE for the year ended December 31, 2017 was approximately $8.2 billion.

European Corporate Bond Market

The European corporate bond market consists of a broad range of products, issuers and currencies. We define the European corporate bond market generally to consist of bonds intended to be distributed to European investors, primarily bonds issued by European corporations, excluding bonds that are issued by corporations domiciled in an emerging markets country and excluding most government bonds that trade in Europe. Examples include:

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bonds issued by European corporations, denominated in any currency;

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bonds generally denominated in Euros, U.S. dollars or British Pounds Sterling intended to be distributed to European investors, excluding bonds that are issued by corporations domiciled in an emerging market;

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bonds issued by supra-national organizations (entities that include a number of central banks or government financial authorities, such as the World Bank), agencies and governments located in Europe, generally denominated in Euros, U.S. dollars or British Pounds Sterling, provided that such currency is not the currency of the country where the bond was issued; and

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floating-rate notes issued by European corporations.

We believe that the European corporate bond market is impacted by many of the same factors as the U.S. high-grade corporate bond market. The total amount of Euro denominated high-grade and high-yield bonds yearly issuance as reported by International Capital Markets Association increased by 14.6% to $447.4 billion in 2017 from $390.4 billion in 2016. The average daily trading volume of European corporate bonds as estimated by Trax® for the year ended December 31, 2017 was approximately $8.7 billion.

U.S. Agency Bond Market

We define the U.S. agency bond market to include debt issued by a U.S. government-sponsored enterprise. Some prominent issuers of agency bonds are the Federal National Mortgage Association and Federal Home Loan Mortgage Corporation. The total amount of U.S. agency bonds outstanding was approximately $1.9 trillion as of September 30, 2017 as reported by SIFMA. The average daily trading volume of U.S. agency bonds (excluding mortgage-backed securities) as measured by TRACE decreased from approximately $5.1 billion for the year ended December 31, 2016 to $3.8 billion for the year ended December 31, 2017.

U.S. Municipal Bond Market

Municipal bonds are debt securities issued by states, cities, counties and other governmental entities in the U.S. to fund day-to-day obligations and to finance a wide variety of public projects, such as highways or water systems. Depending on the type of financing, payments of the principal and interest on a municipal bond may come from general revenues of the municipal issuer, specific tax receipts, revenues generated from a public project, or payments from private entities or from a combination of sources. In addition to being issued for many different purposes, municipal securities are also issued in many different forms, such as fixed rate, zero coupon or variable rate bonds. The interest paid on municipal securities is typically exempt from federal income taxation and may be exempt from state income and other taxes as well. As of December 31, 2017, there were over one million different municipal bonds outstanding, in the total aggregate principal amount of more than $3.8 trillion. In 2017, the average daily trading volume of municipal bonds as measured by the Municipal Securities Rulemaking Board (“MSRB”) decreased to $5.5 billion from approximately $7.4 billion for the year ended December 31, 2016.

Credit Derivative Market

Credit derivatives are contracts on an underlying asset that transfer risk and return from one party to another without transferring ownership of the underlying asset, allowing market participants to obtain credit protection or assume credit exposure associated with a broad range of issuers of fixed-income securities and other debt obligations. Among the most significant requirements of the derivatives section of the Dodd-Frank Act are mandatory clearing of certain derivatives transactions (“swaps”) through regulated central clearing organizations and mandatory trading of those swaps through either regulated exchanges or swap execution facilities (“SEFs”), in each case, subject to certain key exceptions. We operate a swap execution facility pursuant to the U.S. Commodity Futures Trading Commission’s (“CFTC”) rules and we list certain credit derivatives for trading by U.S. persons and other participants on our SEF. The U.S. Securities and Exchange Commission (“SEC”) has not yet finalized its rules for security-based SEFsthat would govern the execution of single-name credit derivatives, nor has it published a timetable for the finalization and implementation of such rules. According to the International Swaps and Derivatives Association (“ISDA”), the average daily trading volume of index credit derivative swaps for 2017 decreased to $27.1 billion from approximately $28.8 billion the year ended December 31, 2016.

In Europe, the first MiFID set best-execution requirements for trades and mandated that financial firms submit to their local regulators detailed end-of-day reports, including the time and price of a trade, the counterparty involved and whether it was a purchase or sale. Firms must either become so-called approved reporting mechanisms (“ARMs”) or use one of the approved providers, such as our Trax® ARM to submit such reports. In the U.K., required transactions are reported to the Financial Conduct Authority (“FCA”). MiFID II significantly increased the number of fields that must be reported to regulators.

Trax® was also approved by the FCA as an APA for transparency and reporting services under the MiFID II regime. The Trax Transparency Solution, which includes the APA, is available through the Trax Insight™ platform, and offers our clients a pre- and post-trade transparency solution including quote publication, SI determination and instrument liquidity classification.

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Trade matching enables counterparties to agree on the terms of a trade shortly after execution, reducing the risk of errors and a trade failing during settlement.Trax Match is our near real-time post-trade matching and exception management tool which covers a broad range of securities, including fixed income and equities. Trax Match helps our clients to mitigate their operational risk, improve straight-through processing (“STP”) and efficiency, address the complexities of MiFID II and the Central Securities Depositories Regulation and confirm all economic details within minutes of execution.

Our Competitive Strengths

Our electronic trading platform provides solutions to many of the shortcomings of traditional bond trading methods. The benefits of our solution are demonstrable throughout the trading cycle:

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Pre-trade — In the pre-trade period, our platform assists our participants by providing them with value-added services, such as real time and historical trade price information, liquidity and turnover analytics, bond reference data and trade order matching alerts;

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Trade — Our innovative electronic trading platform enables our participants to, among other things, request and receive single and multiple security trade execution, with access to broad and unique sources of liquidity from our growing network of participating firms, and the ability to choose from a wide menu of electronic trading protocols to address different trade sizes and liquidity characteristics; and

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Post-trade — Following the execution of a trade, our platform supports all of the essential tools and functionalities to enable our participants to realize the full benefits of electronic trading and demonstrate best execution, including real-time trade details, STP, account allocations, automated audit trails, regulatory trade reporting, trade detail matching, and transaction cost analysis.

We believe that we are well positioned to strengthen our market position in electronic trading in our existing products and to extend our presence into new products and services by capitalizing on our competitive strengths, including:

Significant Trading Volumes with Participation by Leading Broker-Dealers and Institutional Investors

Our electronic trading platform provides access to the liquidity provided through the participation on our platform of over 1,300 active institutional investor and broker-dealer clients, including substantially all of the leading broker-dealers in global fixed-income trading. We believe these broker-dealers represent the principal source of secondary market liquidity for U.S. high-grade corporate bonds, emerging markets and high-yield bonds, European high-grade corporate bonds and the other markets in which we operate. Our broker-dealer clients are motivated to continue to utilize our platform due to the presence on the platform of our large network of institutional investor clients and their ability to use our Open Trading™ protocols to help manage their risk, source liquidity, and facilitate transactions on behalf of their clients.

As shown in the chart below, our total bond trading volume increased from $693.7 billion in 2013 to almost $1.5 trillion in 2017.

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Our adjusted estimated share of U.S. high-grade and high-yield corporate bond volume for 2017 was approximately 16.9% and 6.8%, respectively. Our estimated market share from 2013 to 2017 is shown in the chart below:

* We adjusted the reported U.S. high-grade TRACE volumes to eliminate the increased reporting of affiliate back-to-back trades by certain broker-dealers that occurred from April 2014 through October 2015 because we believe that the TRACE volume, as adjusted by us, provide a more accurate comparison to prior period reporting.

Competitive Prices. By enabling institutional investors to simultaneously request bids or offers from our broker-dealer clients, we believe our electronic trading platform creates an environment that motivates our broker-dealer clients to provide competitive prices and gives institutional investors confidence that they are obtaining a competitive price. For typical MarketAxess multi-dealer corporate bond inquiries, the range of competitive spread-to-Treasury responses is approximately 9 basis points (a basis point is 1/100 of 1% in yield). As an example of the potential cost savings to institutional investors, a one basis point savings on a $1 million face amount trade of a bond with 10 years to maturity translates to aggregate savings of approximately $800. We believe our Open TradingTM protocols enhance our institutional investor clients’ ability to obtain a competitive price by allowing all of our Open TradingTM participants to interact in an all-to-all trading environment, thereby increasing the potential sources of liquidity for each participant, as well as the likelihood of receiving a competitive price response.

Improved Cost Efficiency. We believe that we provide improved efficiency by reducing the time and labor required to conduct broad product and price discovery. Single-security and multi-security (bid or offer lists) inquiries can be efficiently conducted with multiple broker-dealers. In addition, our BondTicker® service eliminates the need for manually-intensive phone calls or e-mail communication to gather, sort and analyze information concerning historical transaction prices.

Limited Information Leakage. Our Open TradingTM protocols allow our institutional investor clients to maintain their anonymity from trade initiation through to settlement without limiting their number of potential trading counterparties. In addition, our Private Axes® protocol allows participants to negotiate bilaterally on an anonymous basis to minimize information leakage when transacting in larger trade sizes.

Greater Sales Efficiency. We offer our broker-dealer clients broad connectivity with our institutional investor clients. Through this connectivity, our broker-dealer clients are able to efficiently display their indications of interest to buy and sell various securities. We also enable broker-dealers to broaden their distribution by participating in transactions to which they otherwise may not have had

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access. In addition, the ability to post prices and electronically execute on straightforward trades enables bond sales professionals at broker-dealer firms to focus their efforts on higher value-added trades and more complex transactions.

More Efficient Inventory Management. The posting of inventory to, and the ability to respond to inquiries from, a broad pool of institutional investors, creates an increased opportunity for broker-dealers to identify demand for their inventory, particularly in less liquid securities. As a result, we believe they can achieve enhanced bond inventory turnover, which may limit credit exposure.

Benefits to Both Institutional Investor and Broker-Dealer Clients. We offer additional benefits over traditional fixed-income trading methods that are shared by both institutional investor and broker-dealer clients, including:

Transparent Pricing on a Range of Securities. Institutional investors and broker-dealer clients can search bonds in inventory based on combinations of issuer, issue, rating, maturity, spread-to-Treasury, size and dealer providing the listing, in a fraction of the time it takes to do so manually. Clients can also request executable bids and offers on our electronic trading platform on any debt security in a database of corporate bonds, although there can be no assurance as to the number of market participants who will choose to provide an executable price. Our platform transmits bid and offer requests in real-time to other participants, who may respond with executable prices within the time period specified by the requestor. Through our Open Trading™ protocols, participants may also elect to display live requests for bids or offers anonymously to all other users of our electronic trading platform, in order to create broader visibility of their inquiry among market participants and increase the likelihood that the request results in a trade. We believe that broader participation in client inquiries will result in more trade matches and lower transaction costs.

Expanded Liquidity Pool. In the post-financial crisis years, liquidity has remained a persistent concern for market participants as regulators raised banks’ capital requirements and adopted other measures that prompted many dealers to reduce market-making activities even as the buy side’s bond holdings have grown rapidly. In this environment Open TradingTM, our fully electronic, all-to-all trading environment, has emerged as one solution to the post-crisis liquidity problem. As a result, the liquidity options for Open TradingTM participants are broader and more diverse compared to the traditional model of bilateral trading with a limited set of dealer counterparties. The expanded pool of liquidity providers includes investment managers, global dealers, regional dealers and specialist market-making and proprietary trading firms. During 2017, more than 800 unique liquidity providers participated in Open TradingTM. Open TradingTM improves the ability of both dealers and institutional investors to find natural matches, move orders more efficiently, and achieve significant increases in execution quality and price improvement.

Greater Trading Accuracy. Our electronic trading platform includes verification mechanisms at various stages of the execution process which result in greater accuracy in the processing, confirming and clearing of trades between institutional investor and broker-dealer clients. These verification mechanisms are designed to ensure that our broker-dealer and institutional investor clients are sending accurate trade messages by providing multiple opportunities to verify they are trading the correct bond, at the agreed-upon price and size. Our platform assists our institutional investor clients in automating the transmittal of order tickets from the portfolio manager to the trader, and from the trader to back-office personnel. This automation provides more timely execution and a reduction in the likelihood of errors that can result from manual entry of information into different systems.

Efficient Risk Monitoring and Compliance. Institutional investors and their regulators are increasingly focused on ensuring that best execution is achieved for fixed-income trades. Our electronic trading platform offers both institutional investors and broker-dealers an automated audit trail for each stage in the trading cycle. This enables compliance personnel to review information relating to trades more easily and with greater reliability. Trade information, including time, price and spread-to-Treasury, is stored securely and automatically on our electronic trading platform. This data represents a valuable source of information for our clients’ compliance personnel. Importantly, we believe the automated audit trail, together with the competitive pricing that is a feature of our electronic trading platform, gives fiduciaries the ability to demonstrate that they have achieved best execution on behalf of their clients.

Other Service Offerings

In addition to services directly related to the execution of trades, we offer our clients several other services, including:

Information Services. The information and analytical tools we provide to our clients help them make investment and trading decisions. Our BondTicker® service provides access to real-time and historical price, yield and MarketAxess estimated spread-to-Treasuries for publicly disseminated TRACE-eligible bonds. BondTicker® combines publicly-available TRACE data with the prices for trades executed on our U.S. bond trading platform, integrating the two data sources and providing real-time TRACE data with associated analytical tools that are not otherwise available. Our electronic trading platform allows institutional investors to compile, sort and use information to discover investment opportunities that might have been difficult or impossible to identify using a manual information-gathering process or other electronic services.

Through our Trax® brand, we provide a range of information solutions for financial services firms, utilizing quotes contributed by market participants and leveraging our post-trade services for European securities. Axess All®, the first intra-day trade tape for the European fixed income market, is sourced from over 30,000 bond transactions processed daily by Trax® and includes aggregated

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volume and pricing for the most actively traded European fixed income instruments. We also provide market participants with access to pricing, liquidity and volume data on over 50,000 unique fixed-income securities and securities reference data for approximately 300,000 fixed-income securities.

Post-Trade Services. Our Trax® service provides post-trade, pre-settlement trade matching and regulatory reporting for the European markets. It allows subscribers to match and report trades in a range of capital market instruments, including bonds, derivatives, equities and swaps. Following the implementation of the T+2 settlement cycle for transferable securities in European markets, subscribers use Trax® to match trades on trade date and help reduce settlement risk. Trax® has over 100 clients, including broker-dealers, hedge funds and investment banks. The Trax® platform processed approximately 1.0 billion transactions in 2017.

The Trax® APA and ARM were among the first granted approval by the FCA to operate under MiFID II. Trax’s transparency and transaction reporting services are each available through the Trax InsightTM platform, which features a customizable, web-based front-end, allowing clients to proactively manage and monitor the status of reporting activity through a single interface.

Straight-Through Processing. STP refers to the integration of systems and processes to automate the trade process from end-to-end — trade execution, confirmation and settlement — without the need for manual intervention. Our electronic trading platform provides broker-dealers and institutional investors with the ability to automate portions of their transaction processing requirements, improving accuracy and efficiency. Through electronic messaging, institutional investors can submit inquiries to, and receive electronic notices of execution from us, in industry standard protocols, complete with all relevant trade details. Institutional investors can download trade messages, allocate trades to the sub-accounts on whose behalf the trades were made and send the allocations to broker-dealers for confirmation.

We have developed proprietary technology that is highly secure, fault-tolerant and provides adequate capacity for our current operations, as well as for substantial growth. Our highly scalable systems are designed to accommodate additional volume, products and clients with relatively little modification and low incremental costs.

Proven Innovator with an Experienced Management Team

Since our inception, we have been an innovator in the fixed-income securities markets. The members of our management team average more than 20 years of experience in the securities industry. We have consistently sought to benefit participants in the markets we serve by attempting to replicate the essential features of fixed-income trading, including the existing relationships between broker-dealers and their institutional investor clients, while applying technology to eliminate weaknesses in traditional trading methods. In recent years, MarketAxess was awarded “OTC Trading Platform of the Year” by Global Capital, “SEF of the Year” by Risk Magazine, and “Best Trading and Execution Technology” by Alt Credit Intelligence.

Some of the innovations we have introduced to electronic trading include:

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the first multi-dealer disclosed trading platform for U.S. high-grade corporate bonds;

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the first electronic Treasury benchmarking for U.S. high-grade corporate bond trades;

the first disclosed client to multi-dealer trading platform for credit derivative indices;

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public Market Lists for corporate bonds, giving institutional investors the ability to display their bid and offer lists anonymously to the entire MarketAxess trading community; and

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Axess All®, the first intra-day trade tape for the European fixed income market.

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Independence

We believe the current regulatory environment creates competitive advantages for independent companies like us that are less prone to conflicts of interest. As an independent company, we are free to make business and trading protocol decisions with the best interests of both our institutional investor and broker-dealer clients in mind. We are also able to attract industry leaders with valuable skills and insights to our independent Board of Directors.

Our Strategy

Our objective is to provide the leading global electronic trading platform for fixed-income securities, connecting broker-dealers and institutional investors more easily and efficiently, while offering a broad array of information, trading and technology services to market participants across the trading cycle. The key elements of our strategy are:

We intend to further enhance the liquidity of securities traded on our leading electronic, multi-dealer to client fixed-income platform. Our ability to innovate and efficiently add new functionality and product offerings to the MarketAxess platform will help us deepen our market share with our existing clients, as well as expand our client base, which we believe will, in turn, lead to even further increases in the liquidity of the securities provided by our broker-dealer clients and available on our platform. We will seek to increase the amount of cross-regional activity by our institutional investor clients on our electronic trading platform, subject to regulatory requirements.

Due to regulatory changes that have caused significant reductions in primary dealer corporate bond balance sheets, our broker-dealer and institutional investor clients need new and innovative electronic trading solutions to promote secondary market liquidity. We intend to continue to develop and deploy a wide range of electronic trading protocols to complement our traditional request-for-quote model. These Open Trading™ protocols increase potential trading counterparties by allowing broker-dealers and institutional investors to interact in an all-to-all trading environment. During 2017, our clients executed approximately 628,000 trades using our Open Trading™ solutions.

Leverage our Existing Technology and Client Relationships to Expand into New Sectors of the Fixed-Income Securities Market

We intend to leverage our technology, as well as our strong broker-dealer and institutional investor relationships, to deploy our electronic trading platform into additional product segments within the fixed-income securities markets and deliver fixed-income securities-related technical services and products. Due in part to our highly scalable systems, we believe we will be able to enter new markets efficiently. For example, in recent years, we expanded our platform to the municipal bond and leveraged loan markets.

Continue to Strengthen and Expand our Trade-Related Service Offerings

We plan to continue building our existing service offerings so that our electronic trading platform is more fully integrated into the workflow of our broker-dealer and institutional investor clients. We expect to continue to add functionality to enhance the ability of our clients to achieve a fully automated, end-to-end straight-through processing solution (automation from trade initiation to settlement). We also plan to expand and enhance the trade matching and regulatory transaction reporting services provided by Trax® in Europe to enable our clients to comply with their heightened obligations pursuant to MiFID II.

Expand our Data and Information Services Offerings

We regularly add new content and analytical capabilities to BondTicker® and Axess All® in order to improve the value of the information we provide to our clients. We intend to continue to widen the user base of our data products and to continue adding new content and analytical capabilities, both in the U.S. and to the data service offering provided by Trax® in Europe. As the use of our electronic trading platform continues to grow, we believe that the amount and value of our proprietary trading data will also increase, further enhancing the value of our information services offerings to our clients.

Pursue Select Acquisitions and Strategic Alliances

We plan to continue to increase and supplement our internal growth by entering into strategic alliances, or acquiring businesses or technologies, that will enable us to enter new markets, provide new products or services, or otherwise enhance the value of our platform to our clients. For example, the acquisition of Xtrakter Limited (“Xtrakter”) in February 2013 provided us with an expanded

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set of technology solutions ahead of incoming pre-and post-trade transparency mandates from MiFID II in Europe. In recent years, we entered into, and expanded, a strategic alliance with BlackRock, Inc. (“BlackRock”) to combine BlackRock’s order flow with our Open Trading™ solution to improve the range of trading connections available to global credit market participants.

MarketAxess Electronic Trading Platform

Key Trading Functionalities

The key trading functionalities of the MarketAxess electronic trading platform are detailed below.

Single Inquiry Trading Functionality

We offer institutional investors the ability to request bids or offers in a single inquiry from an unlimited number of our broker-dealer clients in all of our key trading products. Our platform allows institutional investors to view bids and offers from one or more of our broker-dealer clients while permitting each party to know the identity of its counter-party throughout the trading process. This disclosed inquiry trading functionality combines the strength of existing offline client/dealer relationships with the efficiency and transparency of an electronic trading platform. Institutional investors can obtain bids or offers on any security posted in inventory or included in the database available on our platform.

ASAP and Holding Bin Trading Functionalities

We offer both ASAP (“as soon as possible”) and Holding Bin trading protocols. In the Holding Bin trading protocol, institutional investor clients set the time when they would like all of the broker-dealers’ prices or spreads returned to them, in order to have the ability to see all executable prices available at the same time. In the ASAP trading protocol, institutional investor clients see each broker-dealer’s price or spread as soon as it is entered by the broker-dealer.

List Trading Functionality

We offer institutional investors the ability to request bids or offers on a list of up to 200 bonds depending on the market. This facilitates efficient trading for institutional investors such as investment advisors, mutual funds and hedge funds. Institutional investors are able to have multiple lists executable throughout the trading day, enabling them to manage their daily cash flows, portfolio duration, and credit and sector exposure.

Open Trading Functionality

We offer a series of Open Trading™ protocols that allows our broker-dealer and institutional investor clients to interact in an all-to-all trading environment. Our Market List functionality provides our Open Trading™ participants with the ability to display live requests for bids and offers anonymously to the entire MarketAxess trading community, thereby creating broader visibility of their inquiry among market participants and increasing the likelihood that the request results in a trade. Public Axes™ is an order book-style price discovery process that gives clients the ability to view anonymous or disclosed indications of interest from the inventory on our platform. Through the aggregated indication of interest inventory, clients can search for bonds of interest and engage in electronic transactions. For block-sized trades, clients may use our Private Axes® functionality, a protocol that allows participants to anonymously negotiate round lots (greater than $1.0 million) and block trades to minimize information leakage. We offer Open Trading™ protocols for all of our key trading products, includingcorporate, municipal and emerging market bonds. Bond trades executed pursuant to any of our anonymous Open Trading™ protocol are conducted with MarketAxess on a matched principal basis.

Click-to-Trade

Our click-to-trade functionality allows our investor clients to initiate an inquiry with a single click on stacks of distinctly displayed dealer bids and offers. In support of this functionality, pools of dealers stream attributable pricing for each instrument. Click-to-trade is offered alongside our existing RFQ product and allows pre-trade price discovery and fast-track execution. Although currently limited to credit derivatives, U.S. Treasuries and emerging markets, click-to-trade functionality may be applied to trading of other market sectors.

SEF Trading for Credit Derivatives

We offer a range of functionality for electronic trading of CFTC regulated credit derivatives on our SEF in compliance with the CFTC’s requirements. This includes an RFQ system that allows participants to send anonymous or disclosed RFQs, as well as an order book, which enables market participants to trade anonymously with all other market participants.

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Key Trading Products

U.S. High-Grade Corporate Bonds

Our U.S. high-grade corporate bond business consists of U.S. dollar-denominated investment-grade debt issued by corporations for distribution in the U.S. Both domestic and foreign institutional investors have access to U.S. high-grade corporate bond trading on our electronic trading platform. Our 2017 trading volume in the U.S. high-grade corporate bond market was $825.0 billion.

In the U.S. high-grade corporate bond market, over 85 broker-dealers utilize our platform, including all of the top 20 broker-dealers as ranked by underwriting volume of new-issue U.S. corporate bonds in 2017. Our broker-dealer clients accounted for approximately 97% of the underwriting of newly-issued U.S. corporate bonds in 2017. More than 900 active institutional investor firms use our platform to trade U.S. high-grade corporate bonds.

Emerging Markets Bonds

Approximately 70 of our broker-dealer clients and 850 active institutional investor firms use our platform to trade emerging markets bonds. The emerging markets countries whose bonds were most frequently traded on our platform in 2017 were Mexico, Brazil, Argentina, Turkey, and South Africa. We also enable our institutional investor clients to transact local currency denominated bonds issued by sovereign entities or corporations in countries that include Argentina, Brazil and Mexico. Our 2017 trading volume in the emerging market bond market was $306.7 billion. In 2017, our clients were able to trade corporate and sovereign debt denominated in over 20 local market currencies on our platform.

U.S. Crossover and High-Yield Bonds

Approximately 70 of our broker-dealer clients and 850 active institutional investor firms use our platform to trade crossover and high-yield bonds. Trading in crossover and high-yield bonds uses many of the same features available in our U.S. high-grade corporate bond offering. We also offer leveraged loan trading for our clients that trade high-yield bonds. Our 2017 trading volume in the high-yield bond market was $140.2 billion.

Eurobonds

We offer secondary trading functionality in U.S. dollar- and Euro-denominated European corporate bonds to our broker-dealer and institutional investor clients. We also offer our clients the ability to trade in other European high-grade corporate bonds, including bonds issued in British Pounds Sterling, floating rate notes, European government bonds and bonds denominated in non-core currencies. We offered the first platform in Europe with a multi-dealer disclosed counterparty trading capability for corporate bonds. Our 2017 trading volume in the Eurobond bond market was $127.4 billion.

In the Eurobond credit market, defined as including European high-grade, high-yield and government bonds, 50 broker-dealers utilize our platform, including 18 of the top 20 broker-dealers as ranked by 2017 European corporate new-issue underwriting volume. More than 400 active institutional investor firms use our platform to trade European bonds.

U.S. Agency Bonds

Over 40 of our broker-dealer clients and approximately 320 active institutional investor firms use our platform to trade U.S. agency bonds. Trading in U.S. agency bonds uses many of the same features available in our U.S. high-grade corporate bond offering. Our 2017 trading volume in the U.S. agency bond market was $51.2 billion.

Municipal Bonds

We launched trading of municipal bonds on our platform in 2016 and approximately 110 broker-dealer clients and 470 institutional investor firms have been on-boarded to trade municipal bonds.We offer trading for both taxable and non-taxable municipal bonds. Our 2017 trading volume in the U.S. municipal bond market was approximately $4.0 billion.

Credit Derivatives

MarketAxess offers a complete solution for the trading of clearable and non-clearable credit derivative instruments. Approximately 40 active market participants use our CFTC-registered SEF to trade credit derivative indices and credit options. We support the trading of single-name credit derivatives through our traditional RFQ protocol.

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Information and Post-Trade Services

Information Services

BondTicker® provides real-time TRACE data and enhances it with MarketAxess trade data and analytical tools in order to provide professional market participants with a comprehensive set of corporate bond price information. The data includes trade time and sales information, including execution prices, as well as MarketAxess-estimated spread-to-Treasuries, for trades disseminated by the TRACE system. The data also includes actual execution prices and spread-to-Treasury levels for U.S. high-grade corporate bond trades executed on the MarketAxess platform. BondTicker® is currently the source of corporate bond trading information for The Wall Street Journal in the U.S.

BondTicker® allows institutional investors to search for and sort bonds based upon specific criteria, such as volume, time/date of transaction, spread change, issuer or security. This search function allows institutional investors to compile information relating to potential securities trades in a fraction of the time that it takes to manually compile this information from disparate sources or other electronic databases, including direct TRACE feeds.

BondTicker® also contains pricing information on a broad selection of European fixed-income securities. European pricing information is provided by Trax’s end-of-day pricing feed.

BondTicker® is integrated directly into the MarketAxess electronic trading platform and can be seamlessly accessed, either when viewing securities inventory or when launching an inquiry. BondTicker® is also available through the Internet for non-trading professional market participants, including, among others, research analysts and rating agencies, who can log in and access the information via a browser-based interface.

We provide BondTicker® as an ancillary service to our trading clients and also to other industry participants. We derive revenues from our BondTicker® service by charging for seat licenses per user at our broker-dealer and institutional investor clients, through distribution agreements with other information service providers and through bulk data sales to third parties. Seat license fees are waived for clients that transact a sufficient volume of trades through MarketAxess.

We also offer a set of tools that analyze credit trading activity for institutional investor clients. These tools utilize extensive amounts of market data and have a flexible interface to run and save in a variety of formats, depending on the business purpose. Further, we provide extensive client-specific reports that measure trading performance on our electronic trading platform, including reports for the value of price discovery from multiple dealers, the cost savings generated from Open TradingTM participation and transaction cost analysis.

Through our Trax® brand, we provide a range of information solutions for financial services firms, including Axess All®, the first intra-day trade tape for the European fixed income market. Axess All® utilizes quotes contributed by participants and leverages our post-trade services for European securities. Axess All® is sourced from over 30,000 bond transactions processed daily by Trax® through its post-trade services and includes aggregated volume and pricing for the most actively traded European fixed income instruments.

Post-Trade Services

Our Trax® service provides post-trade, pre-settlement trade matching and regulatory transaction reporting services for the European OTC markets. Subscribers use the Trax® platform to match and report trades in a range of capital market instruments, including bonds, derivatives, equities and swaps. Trax® has over 100 clients, including broker-dealers, hedge funds and investment banks. The Trax® platform processed approximately 1.0 billion transactions in 2017.

Straight-Through Processing and APIs

Straight-through processing refers to the integration of systems and processes to automate the trade process from end-to-end — trade execution, confirmation and settlement — without the need for manual intervention. There are two elements of straight-through processing: internal straight-through processing and external straight-through processing. Internal straight-through processing relates to the trade and settlement processes that are internal to an industry participant. For example, in the case of an institutional investor, this includes authorization of orders, placement of orders with broker-dealers, receipt of execution details and allocation of trades. External straight-through processing refers to connecting seamlessly to all external counterparts in the trading and settlement process.

Automation by way of straight-through processing improves efficiency throughout the trade cycle. We provide broker-dealers and institutional investors with a range of tools that facilitate straight-through processing, including order upload, easy-to-use online allocation tools and pre- and post-trade messaging features that enable institutional investors to communicate electronically between front- and back-office systems, thereby integrating the order, portfolio management and accounting systems of our broker-dealer and

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institutional investor clients in real time. Our straight-through processing tools can be customized to meet specific needs of clients. We continue to build industry partnerships to assist our clients in creating connectivity throughout the trade cycle. Through these partnerships, we are increasingly providing solutions that can quickly be deployed within our clients’ trading operations.

Usage of our straight-through processing tools increased significantly during the last several years. We maintained over 1,100 investor client STP connections as of December 31, 2017. In addition, many of our broker-dealer clients use our Application Programming Interfaces (“API”) services for pre-trade, trade negotiation and post-trade services to improve efficiency and reduce errors in processing.

Sales and Marketing

We promote our products and services using a variety of direct and indirect sales and marketing strategies. Our sales force is responsible for client acquisition activity and for increasing use of our trading platform and information and post-trade services by our existing clients. Their goal is to train and support existing and new clients on how to use our system and to educate them as to the benefits of utilizing an electronic fixed-income trading platform. We employ various strategies, including advertising, direct marketing, promotional mailings, and participation in industry conferences and media engagement, to increase awareness of our brand and our electronic trading platform. For example, we have worked with The Wall Street Journal to establish BondTicker® as the source of information for its daily corporate bond and high-yield tables. A similar process also exists for our Trax® post-trade business, employing both direct and indirect sales methods.

Competition

The industry that we participate in is highly competitive and we expect competition to intensify in the future. We face four main areas of competition:

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Telephone and Direct Electronic Communications — We compete with bond trading business conducted over the telephone, e-mail or instant messaging between broker-dealers and their institutional investor clients. Institutional investors have historically purchased fixed-income securities by telephoning or otherwise communicating via e-mail or instant messaging with bond sales professionals at one or more broker-dealers and inquiring about the price and availability of individual bonds. This remains the manner in which the majority of corporate bonds are still traded between institutional investors and broker-dealers.

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Other electronic trading platforms — There are numerous other electronic trading platforms currently in existence, including several that have only commenced operations in the last few years. Among others, Bloomberg and TradeWeb operate multi-dealer to institutional investor trading platforms for both fixed-income securities and derivatives. Several registered alternative trading systems (“ATSs”) also offer exchange-style trading for corporate and municipal bonds, particularly for smaller trade sizes. In addition, some broker-dealers and institutional investors operate, or have invested in, proprietary electronic trading systems or information networks that enable institutional investors to trade directly with a broker-dealer, and/or with other institutional investors over an electronic medium. As we expand our business into new products, we will likely come into more direct competition with other electronic trading platforms or firms offering traditional services.

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Market data and information vendors — Several large market data and information providers currently have a data and analytics relationship with virtually every institutional firm. Some of these entities, including Bloomberg and Intercontinental Exchange, currently offer varying forms of electronic trading of fixed-income securities. Some of these entities have announced their intention to expand their electronic trading platforms or to develop new platforms. These entities are currently direct competitors to our information services business and already are or may in the future become direct competitors to our electronic trading platform.

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Other approved regulatory mechanisms — We compete with other approved regulatory mechanisms in Europe that have the FCA’s ARM and APA designations, such as the London Stock Exchange’s UnaVista and TradeWeb, to provide post-trade matching and regulatory transaction reporting and transparency services to European clients.

Competitors, including companies in which some of our clients have invested, have developed electronic trading platforms or have announced their intention to explore the development of electronic trading platforms that compete or will compete with us. Furthermore, some of our clients have made, and may in the future continue to make, investments in or enter into agreements with other businesses that directly or indirectly compete with us.

In general, we compete on the basis of a number of key factors, including:

liquidity provided by the participating broker-dealers and, to a growing extent, by other institutional investors;

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magnitude and frequency of price improvement;

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enhancing the quality and speed of execution;

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compliance benefits;

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total transaction costs;

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technology capabilities, including the reliability, security, and ease of use of our electronic trading platform; and

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range of products, protocols and services offered.

We believe that our ability to grow volumes and revenues will largely depend on our performance with respect to these factors.

Our competitive position is also enhanced by the familiarity and integration of our broker-dealer and institutional investor clients with our electronic trading platform and other systems. We have focused on the unique aspects of the credit markets we serve in the development of our platform, working closely with our clients to provide a system that is suited to their needs.

Our broker-dealer clients have invested in building API’s with us for inventory contributions, electronic trading, government bond benchmark pricing and post-trade messaging. We believe that we have successfully built deep roots with our broker-dealer clients, increasing our level of service to them while at the same time increasing their commitment to use our services.

Furthermore, a significant number of our institutional investor firms have built interfaces to enable them to communicate electronically between our platform and their order, portfolio management and accounting systems. We believe that this increases the reliance of these institutional investor firms on our services and creates significant competitive barriers to entry.

Technology

The design and quality of our technology products are critical to our growth and our ability to execute our business strategy. Our electronic trading platform has been designed with secure, scalable client-server architecture that makes broad use of distributed computing to achieve speed, reliability and fault tolerance. The platform is built on industry-standard technologies and has been designed to handle many multiples of our current trading volume.

All critical server-side components, primarily our networks, application servers and databases, have backup equipment running in the event that the main equipment fails. This offers fully redundant system capacity to maximize uptime and minimize the potential for loss of transaction data in the event of an internal failure. We also seek to minimize the impact of external failures by automatically recovering connections in the event of a communications failure. The majority of our broker-dealer clients have redundant dedicated high-speed communication paths to our network in order to provide fast data transfer. Our security measures include industry-standard communications encryption.

We have designed our application with an easy-to-use, Windows-based interface. Our clients are able to access our electronic trading platform through a secure, single sign-on. Clients are also able to execute transactions over our platform directly from their order management systems. We provide users an automatic software update feature that does not require manual intervention.

Intellectual Property

We rely upon a combination of copyright, patent, trade secret and trademark laws, written agreements and common law to protect our proprietary technology, processes and other intellectual property. Our software code, elements of our electronic trading platform, website and other proprietary materials are protected by copyright laws. We have been issued 13 patents covering our most significant trading protocols and other aspects of our trading system technology.

The written agreements upon which we rely to protect our proprietary technology, processes and intellectual property include agreements designed to protect our trade secrets. Examples of these written agreements include third party nondisclosure agreements, employee nondisclosure and inventions assignment agreements, and agreements with customers, contractors and strategic partners. Other written agreements upon which we rely to protect our proprietary technology, processes and intellectual property take many forms and contain provisions related to patent, copyright, trademark and trade secret rights.

We have obtained U.S. federal registration of the MarketAxess® name and logo, and the same mark and logo have been registered in several foreign jurisdictions. In addition, we have obtained U.S. federal registration for the marks AutoSpotting®, FrontPage®, Actives®, DealerAxess®, Trax®, Trade ON®, LiquidityBridge®, BondTicker®, Axess All®, Axess 50®, Private Axes®,and

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associated designs and have a number of other registered trademarks and service marks. Open TradingTM and MarketAxess Bid-Ask Spread Index (BASI) TM are trademarks we use, but they have not been registered.

In addition to our efforts to register our intellectual property, we believe that factors such as the technological and creative skills of our personnel, new product and service developments, frequent enhancements and reliability with respect to our services are essential to establishing and maintaining a technology and market leadership position.

Government Regulation

The securities industry and financial markets in the U.S. and elsewhere are subject to extensive regulation. As a matter of public policy, regulatory bodies in the U.S. and the rest of the world are charged with safeguarding the integrity of the securities and other financial markets and with protecting the interests of investors participating in those markets. Our active broker-dealer and regulated venue subsidiaries fall within the scope of their regulations.

Regulation of the U.S. Securities Industry and Broker-Dealers

In the U.S., the SEC is the governmental agency responsible for the administration of the federal securities laws. One of our U.S. subsidiaries, MarketAxess Corporation, is registered with the SEC as a broker-dealer and an alternative trading system operator. It is also a member of FINRA and registered with the MSRB, self-regulatory organizations that regulate broker-dealers in the U.S. In addition, MarketAxess Corporation is a member of the Securities Investor Protection Corporation, which provides certain protection for clients’ accounts in the event of a liquidation of a broker-dealer to the extent any such accounts are held by the broker-dealer.

Additionally, MarketAxess Corporation is registered with certain states and the District of Columbia as a broker-dealer. The individual states and the District of Columbia are responsible for the administration of their respective “blue sky” laws, rules and regulations.

MarketAxess SEF Corporation, our wholly-owned U.S. subsidiary, operates as a SEF for the trading of certain credit derivatives subject to the CFTC’s jurisdiction, including certain index swaps subject to the CFTC’s ‘made available for trade’ determination that are required to be executed on a SEF or regulated exchange. The SEC has not yet finalized its rules for security-based SEFs, nor has it published a timetable for the finalization and implementation of such rules.

Various rules promulgated since the financial crisis could adversely affect our bank-affiliated broker-dealer clients’ ability to make markets in a variety of fixed-income securities, thereby negatively impacting the level of liquidity and pricing available on our trading platform. For example, while the Volcker Rule does not apply directly to us, the Volcker Rule bans proprietary trading by banks and their affiliates. In addition, enhanced leverage ratios applicable to large banking organizations in the U.S. and Europe require such organizations to strengthen their balance sheets and may limit their ability or willingness to make markets on our trading platform. We cannot predict the extent to which these rules or any future regulatory changes may adversely affect our business and operations.

Regulation of the Non-U.S. Securities Industries and Investment Service Providers

The securities industry and financial markets in the U.K., the European Union (“E.U.”) and elsewhere are subject to extensive regulation. Our principal regulator in the U.K. is the FCA. MarketAxess Europe Limited is registered as a Multilateral Trading Facility (“MTF”) with the FCA and is also a registered platform in Switzerland, Hong Kong and Singapore. Xtrakter is registered as an ARM and APA with the FCA and also has “recognized status” in France, the Netherlands and Belgium in connection with the submission of transaction reports to regulators.

The securities industry in the member states of the E.U. is regulated by agencies in each member state. E.U. measures provide for the mutual recognition of regulatory agencies and of prudential supervision making possible the grant of a single authorization for providers of investment services, which, in general, is valid throughout the E.U. As an FCA approved MTF, MarketAxess Europe Limited receives the benefit of this authorization. In March 2017, the U.K. notified the European Council of its intention to leave the E.U. (commonly referred to as “Brexit”). By invoking Article 50 of the Lisbon Treaty, the U.K. is currently set to leave the E.U. in March 2019. Depending on the terms agreed between E.U. member states and the U.K. as part of the exit negotiations, our U.K. subsidiaries may not be able to rely on the existence of a “passporting” regime that allows immediate access to the single E.U. market. Accordingly, we have begun the process of establishing one or more new regulated subsidiaries in the E.U. in order to provide our trading platform and certain post-trade services to clients in the E.U. following Brexit.

Similar to the U.S., regulatory bodies in Europe have recently developed new rules for the fixed-income markets. MiFID II and Markets in Financial Instruments Regulation (“MiFIR”) were implemented in January 2018 and introduced significant changes in

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market structure designed to: (i) enhance pre- and post-trade transparency for fixed income instruments with the scope of requirements calibrated for liquidity, (ii) increase and enhance post-trade reporting obligationswith a requirement to submit post-trade data to ARMs, (iii) ensure trading of certain derivatives occurs on regulated trading venues and (iv) establish a consolidated tape for trade data. MiFID II and MiFIR may have an adverse effect on our operations or our ability to provide our electronic trading platform in a manner that can successfully compete against other types of regulated and non-regulated venues for the fixed-income trading needs of our clients. In addition, MiFID II has caused us to expend significantly more compliance, business and technology resources, to incur additional operational costs and has created additional regulatory exposure for our trading and post-trade businesses. While we generally believe the net impact of the rules and regulations will be positive for our businesses, unintended consequences of the rules and regulations may adversely affect us in ways yet to be determined.

Our Singapore subsidiary, MarketAxess Singapore Pte. Limited, is authorized to operate as a Recognized Market Operator (“RMO”) and is also a registered platform in Switzerland and Hong Kong. Our Canadian subsidiary, MarketAxess Canada Company, is registered as an Alternative Trading System dealer under the Securities Act of Ontario and is a member of the Investment Industry Regulatory Organization of Canada. Our Brazilian subsidiary, MarketAxess Platforma de Negociacao Ltda., is authorized to provide our platform in Brazil under the jurisdiction of the Securities and Exchange Commission and Central Bank in Brazil. We also provide our platform in other countries pursuant to exemptions from registration under the laws of such countries.

Employees

As of December 31, 2017, we had 429 employees, 261 of whom were based in the U.S. and 168 of whom were based outside of the U.S., principally in the U.K. None of our employees are represented by a labor union. We consider our relationships with our employees to be good and have not experienced any interruptions of operations due to labor disagreements.

Company Information

MarketAxess was incorporated in Delaware in April 2000. Our Internet website address is www.marketaxess.com. Through our Internet website, we will make available, free of charge, the following reports as soon as reasonably practicable after electronically filing them with, or furnishing them to, the SEC: our annual report on Form 10-K; our quarterly reports on Form 10-Q; our current reports on Form 8-K; and amendments to those reports filed or furnished pursuant to Section 13(a) of the Securities Exchange Act of 1934, as amended. Our Proxy Statements for our Annual Meetings are also available through our Internet website. Our Internet website and the information contained therein or connected thereto are not intended to be incorporated into this Annual Report on Form 10-K. You may also obtain copies of our reports without charge by writing to:

MarketAxess Holdings Inc.

299 Park Avenue

New York, NY 10171

Attn: Investor Relations

Our Board of Directors has standing Audit, Compensation, Nominating and Corporate Governance, Risk, Mergers and Acquisitions and Investment Committees. Each of these committees has a written charter approved by our Board of Directors and our Board of Directors has also adopted a set of Corporate Governance Guidelines. Copies of the committee charters and the Corporate Governance Guidelines are also posted on our website.

You may read and copy any document we file with the SEC at the SEC’s public reference room at 100 F Street, NE, Room 1580, Washington, DC 20549. Please call the SEC at 1-800-SEC-0330 for information on the public reference room. The SEC maintains an Internet website that contains annual, quarterly and current reports, proxy and information statements and other information that issuers (including the Company) file electronically with the SEC. The SEC’s internet website is www.sec.gov.

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Item 1A. Risk Factors.

Risks Related to Our Business Generally

Risks Related to Global Economic and Market Conditions

Global economic, political and market factors beyond our control could reduce demand for our services, and our profitability and business could suffer.

The global financial services business is, by its nature, risky and volatile and is directly affected by many national and international factors that are beyond our control. Any one of these factors may cause a substantial decline in the U.S. and/or global financial services markets, resulting in reduced trading volume. These events could have a material adverse effect on our business, financial condition and results of operations. These factors include:

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economic and political conditions in the United States, Europe and elsewhere;

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adverse market conditions, including unforeseen market closures or other disruptions in trading;

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broad trends in business and finance;

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consolidation or contraction in the number of broker-dealers;

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actual or threatened acts of war or terrorism or other armed hostilities;

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concerns over inflation and weakening consumer confidence levels;

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the availability of cash for investment by mutual funds, exchange traded funds and other wholesale and retail investors;

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the level and volatility of interest rates, the difference between the yields on corporate securities being traded and those on related benchmark securities and foreign currency exchange rates;

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the effect of Federal Reserve Board monetary policy, increased capital requirements for banks and other financial institutions, and other regulatory requirements and political impasses;

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credit availability and other liquidity concerns;

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concerns over credit default or bankruptcy of one or more sovereign nations or corporate entities; and

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legislative and regulatory changes, including changes to financial industry regulations and tax laws.

Any one or more of these factors may contribute to reduced activity and prices in the securities markets generally. Our revenues and profitability are likely to decline significantly during periods of stagnant economic conditions or low trading volume in the U.S. and global financial markets.

The U.K. exit from the European Union could materially adversely impact our business, clients, financial condition, results of operations and prospects.

In March 2017, the U.K. notified the European Council of its intention to leave the E.U. By invoking Article 50 of the Lisbon Treaty, the U.K. is currently set to leave the E.U. in March 2019. In its negotiations with the E.U., the U.K. is not seeking to maintain continued access to the E.U. single market following Brexit, which will lead to the loss of the “passporting” rights for regulated financial services firms to automatically operate throughout the E.U. This future loss of the existing passport right to the E.U. will affect us and many of our clients. For us, it means we will no longer be able to conduct business in the E.U. through our U.K. subsidiaries following Brexit.

Current discussions between the U.K. and the E.U. regarding a transitional period following March 2019 envisage a temporary continuation of the existing passporting rights during such period. However, we are not able to predict with any certainty whether the U.K. and the E.U. will be able to agree to a transitional period, which laws and policies will apply during any such transitional period, whether we would be able to rely on the existing “passporting regime” during a transitional period or the length of such period. Accordingly, we have begun the process of establishing new regulated subsidiaries in the E.U. in order to provide our trading platform and certain post-trade services to clients in the E.U. following Brexit.

Brexit is expected to significantly affect the fiscal, monetary and regulatory landscape in both the U.K. and E.U., and could have a material impact on their economies and the future growth of various industries. In particular, the ecosystem of the E.U. financial services industry in which we operate, which prior to Brexit has been heavily centered in London, will become more decentralized. The exit of the U.K., together with the protracted negotiations around the terms of the exit, could significantly impact

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the business environment in which we and our clients operate, increase the cost of conducting business in both the E.U. and the U.K., and introduce significant new uncertainties with respect to the legal and regulatory requirements to which we and our clients are subject. As we currently conduct business in Europe primarily through our U.K. subsidiaries, we will face new regulatory and operational costs and challenges associated with the establishment of new regulated subsidiaries in the E.U and the management of a customer and employee base that is less centralized in London. We could also be adversely affected by reduced growth and greater volatility in the Pound Sterling and the U.K. economy.

Changes to U.K. immigration policy are likewise expected occur as a result of Brexit and our access to, and our ability to compete for and hire, skilled employees in both the U.K. and the E.U. is expected to become more constrained. In addition, Brexit could lead to legal uncertainty and potentially divergent national laws and regulations as the U.K. determines which E.U. laws to replace or replicate. Accordingly, the cost and complexity of operating across increasingly divergent regulatory regimes could increase following Brexit.

Although it is not possible at this point in time to predict fully the effects of an exit of the U.K. from the E.U., or the substance or timeline for any transitional period, any of the foregoing factors could have a material adverse effect on our business, financial condition and results of operations. In addition, Brexit may impact our ability to comply with the extensive government regulation to which we are subject.

Risks Related to Operating in the Electronic Fixed-Income Trading Markets

Decreases in trading volumes in the fixed-income markets generally or on our platform would harm our business and profitability.

We have experienced significant decreases in overall market volumes in the past and may experience similar decreases in market volumes in the future. Declines in the overall volume of fixed-income securities trading and in market liquidity generally, as well as declines in interest rate volatility, could result in lower revenues from commissions for trades executed on our electronic trading platform and fees generated from related activities.

Likewise, decreases in our share of the segments of the fixed-income trading markets in which we operate, or shifts in trading volume to segments of clients which we have not penetrated, could result in lower trading volume on our platform and, consequently, lower commissions and revenue. During periods of increased volatility in credit markets, the use of electronic trading platforms by market participants may decrease dramatically as institutional investors may seek to obtain additional information during the trade process through conversations with broker-dealers. In addition, during rapidly moving markets, broker-dealers are less likely to post prices electronically. Our market share of the fixed-income trading markets is also impacted by a variety of other factors, including the amount of new issuances of corporate debt, the level of bond fund inflows or outflows, the percentage of volumes comprised of Rule 144A transactions, the percentage of volumes comprised of larger trades known as ‘block trades’ and whether the prevalent market environment is an “offer wanted” or “bid wanted” environment.

A decline in overall market volumes, trading volumes on our platform or in our platform’s market share for any reason would negatively affect our commission revenue and may have a material adverse effect on our business, financial condition and results of operations.

Because we operate in a rapidly evolving industry, it is difficult to evaluate our business and prospects.

We face risks and difficulties frequently experienced by companies operating in rapidly evolving industries, such as the electronic financial services industry. These risks and difficulties include, but are not limited to, our ability to:

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attract and retain broker-dealers and institutional investors on our platform on a cost-effective basis;

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expand and enhance reliable and cost-effective product and service offerings to our clients;

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respond effectively to competitive pressures;

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respond effectively to the loss of any of our significant broker-dealer or institutional investor clients, including due to merger, consolidation, bankruptcy, liquidation or other cause (including, among other things, the collection of any amounts due from such clients);

take advantage of acquisitions, strategic alliances and other opportunities; and

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respond to regulatory changes or demands.

If we are unsuccessful in addressing these risks or in executing our business strategy, our business, financial condition and results of operations may suffer.

We may not be able to introduce enhanced versions of our electronic trading platform, new services and/or service enhancements in a timely or acceptable manner, which could harm our competitive position.

Our business environment is characterized by rapid technological change, changing and increasingly sophisticated client demands and evolving industry standards. Our future will depend on our ability to develop and introduce new features to, and new versions of, our electronic trading platform. For example, we have responded to the reduction in fixed-income secondary market liquidity that has been experienced since the credit crisis by, among other things, introducing a number of all-to-all trading options for our institutional investor and broker-dealer clients. The success of new features and versions depends on several factors, including the timely completion, introduction and market acceptance of the feature or version. In addition, the market for our electronic trading platform may be limited if prospective clients require customized features or functions that we are unable or unwilling to provide. We cannot assure you that any new features and versions will become or remain successful. If we are unable to anticipate and respond to the demand for new services, products and technologies and develop new features and enhanced versions of our electronic trading platform that achieve widespread levels of market acceptance on a timely and cost-effective basis, it could have a material adverse effect on our business, financial condition and results of operations.

U.S. federal income tax reform could have an adverse impact on the issuance of new debt in the U.S.

In December 2017, the Tax Cuts and Jobs Act (“Tax Act”) was enacted into law and introduced significant changes to U.S. tax and related laws. In addition to a reduction in the U.S. federal tax rate, the Tax Act caps interest deductibility and reduces the incentives for U.S. companies to keep foreign cash outside the U.S. and, as such, may reduce the levels of new corporate debt issuance in the U.S.

Prior to the Tax Act, federal tax laws generally provided a strong incentive for U.S. companies to finance their operations with debt rather than equity, primarily due to the deductibility of interest on debt financing. The Tax Act limits the deduction for interest expense to 30% of an issuer’s adjusted taxable income for taxable years beginning after December 31, 2017 (initially generally keyed to EBITDA and later to EBIT for taxable years beginning after December 31, 2022, possibly resulting in a further increase in the disallowance of interest expense). Debt incurred prior to the passage of the Tax Act is not grandfathered. While issuers may still consider debt financing a viable funding option, the initial reaction to the limitation on interest expense deductibility may be for issuers to consider debt to be less attractive. In addition, because of the cap on interest expense deductibility in the U.S., issuers may be incentivized to issue debt overseas, where an interest deduction may continue to be available and beneficial. A decrease in the issuance of new debt by U.S. issuers could, over time, reduce the size of the secondary market for U.S. bond trading in which we operate.

Prior to the passage of the Tax Act, earnings of U.S. companies accumulated offshore were generally subject to U.S. tax only when repatriated, with an allowance for foreign taxes previously paid. The Tax Act reduced the U.S. corporate tax rate by 40% and created a territorial system of taxation in which most foreign income is permanently exempt from U.S. tax. The Tax Act’s territorial regime removes the “lockout” on overseas earnings of a U.S.-parented group, allowing redeployment or repatriation of those earnings to be utilized for investments (in the US. or other parts of the world), debt repayment, share buybacks, dividends and acquisitions. Accumulated foreign earnings for multinational corporate groups that have deferred the U.S. tax liability are now subject to taxation at a special one-time rate of 15.5% or less. The ability for U.S. companies to efficiently deploy overseas earnings in the U.S. may reduce the need for such companies to issue new debt in the U.S., which could, over time, reduce the size of the secondary market for U.S. bond trading in which we operate.

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The Tax Act could have an adverse impact on the issuance of new debt in the U.S., which could impact the amount of secondary trading volumes in the U.S. bond market. While we are unable to predict the impact of the Tax Act, any material decline in secondary trading volumes in the U.S. bond market would have a material adverse effect on our business, financial condition, results of operations and prospects.

The fixed-income securities industry generally, and the electronic financial services markets in which we operate in particular, are highly competitive, and we expect competition to intensify in the future. We will continue to compete with bond trading conducted directly between broker-dealers and their institutional investor clients over the telephone or electronically. In addition, our current and prospective competitors are numerous and include:

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other multi-dealer trading companies;

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market data and information vendors;

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securities and futures exchanges;

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inter-dealer brokerage firms;

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electronic communications networks;

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technology, software, and information services or other companies that have existing commercial relationships with broker-dealers or institutional investors; and

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other electronic marketplaces that are not currently in the securities business.

Many of our current and potential competitors are more established and substantially larger than we are and have substantially greater market presence, as well as greater financial, technical, marketing and other resources. These competitors may aggressively reduce their pricing to enter into, or otherwise compete in, market segments in which we provide services, potentially subsidizing any losses with profits from trading in other fixed-income or equity securities or other business operations. In addition, many of our competitors offer a wider range of services, have broader name recognition and have larger customer bases than we do. Some of them may be able to respond more quickly to new or evolving opportunities, technologies and customer requirements than we can and may be able to undertake more extensive promotional activities.

Any combination of our competitors may enter into joint ventures or consortia to provide services similar to those provided by us. Current and new competitors can launch new platforms at a relatively low cost. Others may acquire the capabilities necessary to compete with us through acquisitions. We expect that we will potentially compete with a variety of companies with respect to each product or service we offer. If we are not able to compete successfully in the future, our business, financial condition and results of operations would be adversely affected.

Our operations also include the sale of information and analytical tools under our BondTicker® and Trax® brands and post-trade services, such as pre-settlement trade matching and transaction reporting and transparency services for the European markets. There is a high degree of competition in data, pricing and post-trade products and services and such businesses may become more competitive in the future as new competitors emerge. Our information products and post-trade and services lines may be threatened by new regulations, market trends or technologies that reduce their value. If we are not able to compete successfully in the future, our revenues could be adversely impacted and, as a result, our businesses, financial condition and results of operations would be adversely affected.

Neither the sustainability of our current level of business nor any future growth can be assured. Even if we do experience growth, we cannot assure you that we will grow profitably.

The success of our business strategy depends, in part, on our ability to maintain and expand the network of broker-dealer and institutional investor clients that use our electronic trading platform. Our business strategy also depends on increasing the use of our platform by these clients for a wide range of fixed-income products and trade sizes. Individuals at broker-dealers or institutional investors may have conflicting interests, which may discourage their use of our platform. We cannot assure you that the growth of electronic means of trading securities that we have experienced in recent years will continue.

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Our growth may also be dependent on our ability to diversify our revenue base. We currently derive approximately 50.8% of our revenues from secondary trading in U.S. high-grade corporate bonds. Our long-term business strategy includes expanding our service offerings and increasing our revenues from other fixed-income products and other sources. We cannot assure you that our efforts will be successful or result in increased revenues or continued profitability. We have experienced significant growth in trading volumes, revenues and profitability in recent years. We cannot assure you that our business will continue to grow at a similar rate, if at all.

We may enter into new fee plans, the impact of which may be difficult to evaluate; past trends in commissions are not necessarily indicative of future commissions.

From time to time, we may introduce new fee plans for the market segments in which we operate. Any new fee plan may include different fee structures or provide volume incentives. We cannot assure you that any new fee plans will result in an increase in the volume of transactions executed over our platform or that our revenues will increase as a result of the implementation of any such fee plans. It is possible that our broker-dealer or institutional investor clients could respond to a new fee plan by either reducing the amount of their business conducted on our platform or terminating their contractual relationship with us, which could have an adverse impact on our fees and otherwise have a material adverse effect on our business, financial condition and results of operations.

In addition, under certain of our fee plans, our fees are designated in basis points in yield (and, as a result, are subject to fluctuation depending on the duration of the bond traded) or our fees vary based on trade size or maturity. We anticipate that our average fees per million may vary in the future due to changes in yield, years-to-maturity and nominal size of bonds traded on our platform. Consequently, past trends in commissions are not necessarily indicative of future commissions.

If we experience significant fluctuations in our operating results or fail to meet revenue and earnings expectations, our stock price may fall rapidly and without advance notice.

Our revenues and operating results may fluctuate due to a number of factors, including:

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the unpredictability of the financial services industry;

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difficulty in quickly adjusting our expense base if revenues fall short of expectations;

new regulations that limit or affect how our electronic trading platform can operate or which increase our regulatory compliance costs.

As a result, our operating results may fluctuate significantly on a quarterly basis, which could result in decreases in our stock price.

As we enter new markets, we may not be able to successfully attract clients and adapt our technology and marketing strategy for use in those markets.

Our strategy includes leveraging our electronic trading platform to enter new markets, such as our recent entry into the municipal bond and leveraged loan markets. However, we cannot assure you that we will be able to successfully adapt our proprietary software and technology for use in these and other markets. Even if we do adapt our software and technology, we cannot assure you that we will be able to attract clients and compete successfully in any such new markets. We cannot assure you that our marketing efforts or our pursuit of any of these opportunities will be successful. If these efforts are not successful, we may realize less than

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expected earnings, which in turn could result in a decrease in the market value of our common stock. Furthermore, these efforts may divert management attention or inefficiently utilize our resources.

Risks Related to our Geographic and Customer Concentration

Our businesses are geographically concentrated and could be significantly affected by an adverse change in the regions in which we operate.

Historically, our business operations have been substantially located in the U.S. and the U.K. While we are expanding our businesses to new geographic areas, we are still highly concentrated in these areas. Accordingly, our businesses are exposed to adverse regulatory and competitive changes, economic downturns and changes in political conditions in these two countries, such as Brexit. Moreover, due to the concentration of our operations in these areas, such operations are less diversified and, accordingly, are subject to greater regional risks than those of some of our competitors. If we are unable to identify and successfully manage or mitigate these risks, our businesses, financial condition, results of operations and prospects could be materially adversely affected.

We are dependent on our broker-dealer clients, who are not restricted from using their own proprietary or third-party platforms to transact with our institutional investor clients.

We rely on our broker-dealer clients to provide liquidity on our electronic trading platform by posting bond prices on our platform for bonds in their inventory and responding to institutional investor client inquiries. The contractual obligations of our broker-dealer clients to us are minimal, non-exclusive and terminable by such clients. Our broker-dealer clients buy and sell fixed-income securities through traditional methods, including by telephone and e-mail messaging, and through other electronic trading platforms. Some of our broker-dealer clients have developed electronic trading networks that compete with us or have announced their intention to explore the development of such electronic trading networks, and many of our broker-dealer and institutional investor clients are involved in other ventures, including other electronic trading platforms or other distribution channels, as trading participants and/or as investors. These competing trading platforms may offer some features that we do not currently offer. Accordingly, there can be no assurance that such broker-dealers’ primary commitments will not be to one of our competitors.

In the U.S., the Volcker Rule section of the Dodd-Frank Act bans proprietary trading by banks and their affiliates, which could adversely affect our bank-affiliated broker-dealer clients’ ability to make markets in a variety of fixed-income securities. If bank-affiliated entities reduce their trading activity and that activity is not replaced by other market participants, the level of liquidity and pricing available on our trading platform would be negatively impacted, which could adversely affect our operating results. In addition, there has been significant consolidation among firms in the banking and financial services industries over the past several years. Moreover, several of our large broker-dealer clients have reduced their sales and trading businesses in fixed-income in recent years. Further consolidation, instability, and layoffs in the financial services industry could result in a smaller client base and heightened competition, which may lower volumes.

Any reduction in the use of our electronic trading platform by our broker-dealer clients could reduce the volume of trading on our platform, which could, in turn, reduce the use of our platform by our institutional investor clients. The occurrence of any of the foregoing may have a material adverse effect on our business, financial condition and results of operations.

We could lose significant sources of revenue and trading volume if we lose any of our significant institutional investor clients.

We rely on our institutional investor clients to launch inquiries over our trading platform. A limited number of such clients can account for a significant portion of our trading volume. One institutional investor client accounted for approximately 12.2%, 14.2% and 15.3% of trading volumes during the years ended December 31, 2017, 2016 and 2015, respectively. Based on information filed with the SEC by this institutional investor client, as of December 31, 2017, investment funds managed by this institutional investor client beneficially owned approximately 8.3% of the outstanding shares of our common stock, primarily through passive index and ETF funds.

The obligations of our institutional investor clients to us under our standard contractual agreements are minimal, non-exclusive and terminable by such clients. Our institutional investor clients buy and sell fixed-income securities through traditional methods, including by telephone and e-mail messaging, and through other electronic trading platforms.

There can be no assurance that we will be able to retain our major institutional investor clients or that such clients will continue to use our trading platform. The loss of a major institutional investor client or any reduction in the use of our electronic trading platform by such clients could have a material adverse effect on our business, financial condition and results of operations.

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Credit and Market Risks

We are exposed to risks in connection with certain transactions in which we act as a matched principal intermediary.

In connection with our anonymous Open Trading™ protocols, we execute certain bond transactions between and among institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller in trades which are then settled through a third-party clearing broker. Settlement typically occurs within one to two trading days after the trade date. Cash settlement of the transaction occurs upon receipt or delivery of the underlying instrument that was traded.

We are exposed to credit and performance risks in our role as matched principal trading counterparty to our clients executing Open Trading™ trades on our platform, including the risk that counterparties that owe us money or securities will not perform their obligations. These parties may default on their obligations to us due to bankruptcy, lack of liquidity, operational failure or other reasons. Adverse movements in the prices of securities that are the subject of these transactions can increase our risk. In connection with Open Trading™ or other anonymous protocols, we expect that the number of transactions in which we act as a matched principal will increase.

In the process of executing matched principal transactions, miscommunications and other errors by our clients or us can arise that involve substantial risks of liability. These risks include, among others, potential liability from disputes over the terms of a trade, the settlement of the trade, or claims that we resolved an error trade dispute incorrectly or that a system malfunction or delay caused monetary loss to a client. In addition, because of the ease and speed with which trades can be executed on our electronic platform, clients can lose substantial amounts by inadvertently entering trade instructions or by entering trade orders inaccurately. A significant error trade or a large number of error trades could result in participant dissatisfaction and a decline in participant willingness to trade on our electronic platform. Although we maintain error trade policies designed to protect our Open Trading™ participants and enable us to manage the risks attendant in acting as a matched principal counterparty, depending on the cause, number and value of the trades that are the subject of an alleged error or dispute, such trades have the potential to have a material adverse effect on our financial condition and results of operations. In addition, if we are required to hold a securities position as a result of an error, there may also be financing costs or regulatory capital charges required to be taken by us.

We have policies and procedures in place to identify and manage our credit risk. In connection with the recent growth of our Open Trading™ protocols, we have implemented additional automated controls to help us manage our credit risk exposure. There can be no assurance that the policies, procedures and automated controls we use to manage this credit risk will effectively mitigate our credit risk exposure. Some of our risk management procedures are reliant upon the evaluation of information regarding the fixed- income markets, our clients or other relevant matters that are publicly available or otherwise acquired from third party sources. Such information may not be accurate, complete, up-to-date or properly assessed and interpreted by us. If our risk management procedures fail, our business, financial condition and results of operations may be adversely affected. Furthermore, our insurance policies are unlikely to provide coverage for such risks.

We cannot assure you that our compliance and risk management methods will be effective and our financial condition and results of operations may be materially and adversely affected if they fail.

To manage the risks inherent in our business, we must maintain effective policies, procedures and systems that enable us to identify, monitor and control our exposure to financial, legal, regulatory, operational and market risks. Our risk-management methods are based on internally developed controls, observed historical market behavior and what we believe to be industry practices. Our risk-management methods may prove to be ineffective because of their design, their implementation or the lack of adequate, accurate or timely information. Our risk management methods may also fail to identify a risk or understand a risk that might result in losses. If our risk-management policies and efforts are ineffective, we could suffer losses that could have a material adverse effect on our financial condition and operating results.

We must rely upon our analysis of information regarding markets, personnel, clients or other matters that is publicly available or otherwise accessible to us. That information may not in all cases be accurate, complete, up-to-date or properly analyzed. Furthermore, we rely on a combination of technical and human controls and supervision that are subject to error and potential failure, the challenges of which are exacerbated by the 24-hour-a-day, global nature of our business.

Our success in complying with complex and changing laws and navigating risks in various jurisdictions and markets depends on our maintenance of compliance, auditing and reporting systems and risk management procedures, as well as our ability to recruit and retain qualified compliance and risk management personnel. While we have developed policies and procedures to identify, monitor and manage our legal, regulatory, operational and market risks, we cannot assure you that our systems will always be effective in monitoring or evaluating the risks to which we are exposed.

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Technology and IT Systems Risks

Rapid market or technological changes may render our technology obsolete or decrease the attractiveness of our products and services to our broker-dealer and institutional investor clients.

We must continue to enhance and improve our electronic trading platform. The electronic financial services industry is characterized by significant structural changes, increasingly complex systems and infrastructures, changes in clients’ needs and preferences and new business models. If new industry standards and practices emerge and our competitors release new technology before us, our existing technology, systems and electronic trading platform may become obsolete or our existing business may be harmed. Our future success will depend on our ability to:

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enhance our existing products and services;

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develop and/or license new products and technologies that address the increasingly sophisticated and varied needs of our broker-dealer and institutional investor clients and prospective clients;

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continue to attract highly-skilled technology personnel; and

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respond to technological advances and emerging industry standards and practices on a cost-effective and timely basis.

Developing our electronic trading platform and other technology entails significant technical and business risks. We may use new technologies ineffectively or we may fail to adapt our electronic trading platform, information databases and network infrastructure to broker-dealer or institutional investor client requirements or emerging industry standards. If we face material delays in introducing new services, products and enhancements, our broker-dealer and institutional investor clients may forego the use of our products and use those of our competitors.

Further, the adoption of new Internet, networking, telecommunications or blockchain technologies may require us to devote substantial resources to modify and adapt our services. We cannot assure you that we will be able to successfully implement new technologies or adapt our proprietary technology and transaction-processing systems to client requirements or emerging industry standards. We cannot assure you that we will be able to respond in a timely manner to changing market conditions or client requirements.

We depend on third-party suppliers for key products and services.

We rely on a number of third parties to supply elements of our trading, information and other systems, as well as computers and other equipment, and related support and maintenance. We cannot assure you that any of these providers will be willing and able to continue to provide these services in an efficient, cost-effective manner, if at all, or that they will be able to adequately expand their services to meet our needs. If we are unable to make alternative arrangements for the supply of critical products or services in the event of a malfunction of a product or an interruption in or the cessation of service by an existing service provider, our business, financial condition and results of operations could be materially adversely affected.

In particular, we depend on third-party vendors for our bond reference databases and the clearing and settlement of our Open Trading™ transactions. Disruptions in the services provided by those third-parties to us, including as a result of their inability or unwillingness to continue to license products or provide services that are critical to the success of our business, could have a material adverse effect on our business, financial condition and results of operations.

We also rely, and expect in the future to continue to rely, on third parties for various computer and communications systems, such as telephone companies, online service providers, data processors, cloud computing and software and hardware vendors. Other third parties provide, for instance, our data center, telecommunications access lines and significant computer systems and software licensing, support and maintenance services. Any interruption in these or other third-party services or deterioration in their performance could impair the quality of our service. We cannot be certain of the financial viability of all of the third parties on which we rely.

We license software from third parties, much of which is integral to our electronic trading platform and our business. We also hire contractors to assist in the development, quality assurance testing and maintenance of our electronic trading platform and other systems. Continued access to these licensors and contractors on favorable contract terms or access to alternative software and information technology contractors is important to our operations. Adverse changes in any of these relationships could have a material adverse effect on our business, financial condition and results of operations.

We attempt to negotiate favorable pricing, service, confidentiality and intellectual property ownership or licensing and other terms in our contracts with our third-party service providers. These contracts usually have multi-year terms. However, there is no

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guarantee that these contracts will not terminate and that we will be able to negotiate successor agreements or agreements with alternate service providers on competitive terms. Further, the existing agreements may bind us for a period of time to terms and technology that become obsolete as our industry and our competitors advance their own operations and use of technology.

In order to be successful, we must provide reliable, secure, real-time access to our electronic trading platform for our clients. If our electronic trading platform is hampered by slow delivery times, unreliable service or insufficient capacity, our clients may decide to stop using our platform, which would have a material adverse effect on our business, financial condition and results of operations.

As our operations grow in both size and scope, we will need to continually improve and upgrade our electronic trading platform and infrastructure to accommodate potential increases in order message volume and trading volume, the trading practices of new and existing clients, regulatory changes and the development of new and enhanced trading platform features, functionalities and ancillary products and services. The expansion of our electronic trading platform and infrastructure has required, and will continue to require, substantial financial, operational and technical resources. These resources will typically need to be committed well in advance of any actual increase in trading volumes and order messages. We cannot assure you that our estimates of future trading volumes and order messages will be accurate or that our systems will always be able to accommodate actual trading volumes and order messages without failure or degradation of performance. Furthermore, we use new technologies to upgrade our established systems, and the development of these new technologies also entails technical, financial and business risks. We cannot assure you that we will successfully implement new technologies or adapt our existing electronic trading platform, technology and systems to the requirements of our broker-dealer and institutional investor clients or to emerging industry standards. The inability of our electronic trading platform to accommodate increasing trading volume and order messages would also constrain our ability to expand our business.

Our computer systems may suffer failures and business interruptions that could increase our operating costs and cause us to lose clients.

We cannot assure you that we, or our third-party service providers, will not experience systems failures. Our electronic trading platform, computer and communication systems and other operations are vulnerable to damage, interruption or failure as a result of, among other things:

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irregular or heavy use of our electronic trading platform during peak trading times or at times of unusual market volatility;

acts of war or terrorism (including cyberterrorism) or other armed hostility;

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cybersecurity breaches; and

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loss of support services from third parties, including those to whom we outsource aspects of our computer infrastructure critical to our business.

In the event that any of our systems, or those of our third-party providers, fail or operate slowly, it may cause any one or more of the following to occur:

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unanticipated disruptions in service to our clients;

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distribution of untimely or inaccurate market data to customers who rely on this data for their trades;

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slower response times or delays in our clients’ trade execution;

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incomplete or inaccurate accounting, recording or processing of trades;

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financial losses and liabilities to clients;

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litigation or other claims against us, including formal complaints to industry regulatory organizations; and

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regulatory inquiries, proceedings or sanctions.

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Any system failure that causes an interruption in service or decreases the responsiveness of our service could damage our reputation, business and brand name and lead our clients to decrease or cease their use of our electronic trading platform.

In these circumstances, if we were unable to execute our disaster recovery plans, or our redundant systems and disaster recovery plans proved insufficient for the particular situation, it could have a material adverse effect on our business. Similarly, although many of our contracts with our service providers require them to have disaster recovery plans, we cannot be certain that these will be adequate or implemented properly. In addition, our business interruption insurance may not adequately compensate us for losses that may occur.

It is also a risk that we will not have sufficient personnel to properly respond to all such system problems. Our disaster recovery plans are heavily reliant on the availability of the internet and mobile phone technology, so any disruption of those systems would likely affect our ability to recover promptly from a crisis situation.

We internally support and maintain many of our computer systems and networks, including those underlying our electronic trading platform. Our failure to monitor or maintain these systems and networks or, if necessary, to find a replacement for this technology in a timely and cost-effective manner would have a material adverse effect on our business, financial condition and results of operations.

Cybersecurity Risks

Malicious cyber-attacks and other adverse events affecting our operational systems or infrastructure, or those of third parties, could disrupt our businesses, result in the disclosure of confidential information, damage our reputation and cause losses or regulatory penalties.

The operation of our electronic trading platform relies on the secure processing, storage and transmission of a large amount of transactional data and other confidential sensitive data (including confidential client and personal information). Although we take protective measures such as security-related software programs, firewalls and similar technology to maintain the confidentiality, integrity and availability of our and our customers’ information, and endeavor to modify these protective measures as circumstances warrant, the nature of cyber threats continues to evolve. As a result, our computer systems, software and networks may be vulnerable to unauthorized access, loss or destruction of data (including confidential customer personal information), unavailability or disruption of service, computer viruses, acts of vandalism, or other malicious code, cyber-attack and other adverse events that could have an adverse security impact. Despite the defensive measures we have taken, these threats may come from external factors such as governments, organized crime, hackers, and other third parties such as infrastructure-support providers and application developers, or may originate internally from an employee or service provider to whom we have granted access to our computer systems. If our security measures are breached as a result of third-party action, employee error, malfeasance or otherwise, and, as a result, someone obtains unauthorized access to trading or other confidential or personal information, our reputation could be damaged, our business would suffer and we could incur material liability. Any such breach could compromise our networks and the information stored there could be accessed, publicly disclosed, lost or stolen. Because techniques used to obtain unauthorized access or to sabotage computer systems change frequently and generally are not recognized until launched against a target, we may be unable to anticipate these techniques or to implement adequate preventive measures.

We also face the risk of operational disruption, failure or capacity constraints of any of the third party service providers that facilitate our business activities, including clients, clearing agents and network or data providers. Such parties could also be the source of a cyber-attack on or breach of our operational systems, data or infrastructure.

There have been an increasing number of cyber-attacks in recent years in various industries, including ours, and cyber-security risk management has been the subject of increasing focus by our regulators. If one or more cyber-attacks occur, it could potentially jeopardize the confidential, proprietary and other information processed and stored in, and transmitted through, our computer systems and networks, or otherwise cause interruptions or malfunctions in our, as well as our customers’ or other third parties’, operations, which could result in reputational damage, financial losses, customer dissatisfaction and/or regulatory penalties, which may not in all cases by covered by insurance. Any such cyber incidents involving our computer systems and networks, or those of third parties important to our businesses, could have a material adverse effect on our businesses, financial condition, results of operations and prospects.

Our regulators in recent years have increased their examination and enforcement focus on matters relating to cybersecurity threats, including the assessment of firms’ vulnerability to cyber-attacks. In particular, regulatory concerns have been raised about firms establishing effective cybersecurity governance and risk management policies, practices and procedures; protecting firm networks and information; identifying and addressing risks associated with clients, vendors, and other third parties; preventing and detecting unauthorized activities; adopting effective mitigation and business continuity plans to address the impact of cybersecurity breaches; and establishing protocols for reporting cybersecurity incidents. While any insurance that we may have that covers a specific cybersecurity incident may help to prevent our realizing a significant loss from the incident, it would not protect us from the effects of

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adverse regulatory actions that may result from the incident or a finding that we had inadequate cybersecurity controls, including the reputational harm that could result from such regulatory actions.

Our remediation costs and lost revenues could be significant if we fall victim to a cyber-attack. If an actual, threatened or perceived breach of our security occurs, the market perception of the effectiveness of our security measures could be harmed and could cause our clients to reduce or stop their use of our electronic trading platform. We may be required to expend significant resources to repair system damage, protect against the threat of future security breaches or to alleviate problems, including reputational harm, loss of clients and revenues and litigation, caused by any breaches. We may be found liable to our clients for any misappropriated confidential or personal information. Although we intend to continue to implement industry-standard security measures, we cannot assure you that those measures will be sufficient.

Intellectual Property Risks

We may not be able to protect our intellectual property rights or technology effectively, which would allow competitors to duplicate or replicate our electronic trading platform or any of our other current or future products or services. This could adversely affect our ability to compete.

Intellectual property is critical to our success and ability to compete, and if we fail to protect our intellectual property rights adequately, our competitors might gain access to our technology. We rely primarily on a combination of patent, copyright, trademark and trade secret laws in the United States and other jurisdictions, as well as license agreements, third-party non-disclosure and other agreements and other contractual provisions and technical measures to protect our intellectual property rights. We attempt to negotiate beneficial intellectual property ownership provisions in our contracts and also require employees, consultants, advisors and collaborators to enter into confidentiality agreements in order to protect the confidentiality of our proprietary information. We have been issued 13 patents covering aspects of our technology and/or business, but can give no assurances that any such patents will protect our business and processes from competition or that any patents applied for in the future will be issued. Additionally, laws and our contractual terms may not be sufficient to protect our technology from use or theft by third parties. For instance, a third party might reverse engineer or otherwise obtain and use our technology without our permission and without our knowledge, thereby infringing our rights and allowing competitors to duplicate or replicate our products. Furthermore, we cannot assure you that these protections will be adequate to prevent our competitors from independently developing technologies that are substantially equivalent or superior to our technology.

We may have legal or contractual rights that we could assert against illegal use of our intellectual property rights, but lawsuits claiming infringement or misappropriation are complex and expensive, and the outcome would not be certain. In addition, the laws of some countries in which we now or in the future provide our services may not protect software and intellectual property rights to the same extent as the laws of the United States.

Defending against intellectual property infringement or other claims could be expensive and disruptive to our business. If we are found to infringe the proprietary rights of others, we could be required to redesign our products, pay royalties or enter into license agreements with third parties.

In the technology industry, there is frequent litigation based on allegations of infringement or other violations of intellectual property rights. As the number of participants in our market increases and the number of patents and other intellectual property registrations increases, the possibility of an intellectual property claim against us grows. Although we have never been the subject of a material intellectual property dispute, we cannot assure you that a third party will not assert in the future that our technology or the manner in which we operate our business violates its intellectual property rights. From time to time, in the ordinary course of our business, we may become subject to legal proceedings and claims relating to the intellectual property rights of others, and we expect that third parties may assert intellectual property claims against us, particularly as we expand the complexity and scope of our business, the number of electronic trading platforms increases and the functionality of these platforms further overlaps. Any claims, whether with or without merit, could:

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be expensive and time-consuming to defend;

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prevent us from operating our business, or portions of our business;

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cause us to cease developing, licensing or using all or any part of our electronic trading platform that incorporates the challenged intellectual property;

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require us to redesign our products or services, which may not be feasible;

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result in significant monetary liability;

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divert management’s attention and resources; and

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require us to pay royalties or enter into licensing agreements in order to obtain the right to use necessary technologies, which may not be possible on commercially reasonable terms.

We cannot assure you that third parties will not assert infringement claims against us in the future with respect to our electronic trading platform or any of our other current or future products or services or that any such assertion will not require us to cease providing such services or products, try to redesign our products or services, enter into royalty arrangements, if available, or engage in litigation that could be costly to us. Any of these events could have a material adverse effect on our business, financial condition and results of operations.

Risks Related to Possible Transactions or Investments

If we acquire or invest in other businesses, products or technologies, we may be unable to integrate them with our business, our financial performance may be impaired or we may not realize the anticipated financial and strategic goals for any such transactions.

We have in the past and may in the future acquire or invest in companies, products or technologies that we believe are strategic. We may not be able to identify, negotiate or finance any future acquisition or investment successfully. Even if we do succeed in acquiring or investing in a business, product or technology, such acquisitions and investments may involve a number of risks, including:

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we may find that the acquired company or assets do not further our business strategy, or that we overpaid for the company or assets, or the economic conditions underlying our acquisition decision may change;

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we may have difficulty integrating the acquired technologies or products with our existing electronic trading platform, products and services;

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we may have difficulty integrating the operations and personnel of the acquired business, or retaining the key personnel of the acquired business;

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there may be client confusion if our services overlap with those of the acquired company and we may have difficulty retaining key customers, vendors and other business partners of the acquired business;

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our ongoing business and management’s attention may be disrupted or diverted by transition or integration issues and the complexity of managing geographically or culturally diverse enterprises;

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entry into markets in which we have limited experience and where competitors hold stronger market positions;

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potential failure of the due diligence processes to identify significant problems, liabilities or other challenges of an acquired company or product; and

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exposure to litigation or other claims in connection with, or inheritance of claims or litigation risk as a result of, an acquisition, including but not limited to, claims from terminated employees, customers, former stockholders or other third parties.

These factors could have a material adverse effect on our business, financial condition, results of operations and cash flows, particularly in the case of a larger acquisition or multiple acquisitions in a short period of time. From time to time, we may enter into negotiations for acquisitions or investments that are not ultimately consummated. Such negotiations could result in significant diversion of management time, as well as out-of-pocket costs.

The consideration paid in connection with an investment or acquisition also affects our financial results. If we were to proceed with one or more significant acquisitions in which the consideration included cash, we could be required to use a substantial portion of our available cash to consummate any acquisition. To the extent we issue shares of capital stock or other rights to purchase capital stock, including options or other rights, existing stockholders may be diluted and earnings per share may decrease. In addition, acquisitions may result in the incurrence of debt, large one-time write-offs, such as of acquired in-process research and development costs, and restructuring charges.

With respect to our information and post-trade services businesses, we may incur substantial development, sales and marketing expenses and expend significant management effort to create a new product or service. Even after incurring these costs, we ultimately may not sell any or sell only small amounts of these products or services. Consequently, if revenue does not increase in a timely fashion as a result of these expansion and development initiatives, the up-front costs associated with them may exceed the related revenue and reduce our working capital and income.

We may be required to recognize impairments of our goodwill or other intangible assets, which could adversely affect our results of operations or financial condition.

The determination of the value of goodwill and other intangible assets requires management to make estimates and assumptions that affect our consolidated financial statements. We test for impairment of goodwill on an annual basis, at year-end, or more frequently if there are changed circumstances. We assess intangible assets for impairment when events or circumstances indicate the existence of a possible impairment.

Determining the fair value of certain assets acquired and liabilities assumed is judgmental in nature and requires management to use significant estimates and assumptions, including assumptions with respect to future cash flows, discount rates, growth rates and asset lives. Any future acquisition may result in goodwill and other intangible assets that are subject to impairment tests, which could result in future impairment charges.

Risks Related to Key Personnel and Employees

We are dependent on our management team, and the loss of any key member of this team may prevent us from implementing our business plan in a timely manner.

Our success depends largely upon the continued services of our executive officers and other key personnel, particularly Richard M. McVey, Chief Executive Officer and Chairman of our Board of Directors. The terms of Mr. McVey’s employment agreement with us do not require him to continue to work for us and allow him to terminate his employment at any time, subject to certain notice requirements and forfeiture of non-vested equity compensation awards. We do not maintain “key person” life insurance on any of our executive officers and other key personnel. Any loss or interruption of Mr. McVey’s services or that of one or more of our other executive officers or key personnel for any reason, as well as any negative market or industry perception arising from such loss or interruption, could result in our inability to manage our operations effectively and/or pursue our business strategy.

Because competition for our employees is intense, we may not be able to attract and retain the highly skilled employees we need to support our business.

We strive to provide high-quality services that will allow us to establish and maintain long-term relationships with our broker-dealer and institutional investor clients. Our ability to provide these services and maintain these relationships, as well as our ability to execute our business plan generally, depends in large part upon our employees. We must attract and retain highly qualified personnel. Competition for these personnel is intense, especially for software engineers with extensive experience in designing and developing software and Internet-related services, hardware engineers, technicians, product managers and senior sales executives.

The market for qualified personnel has become increasingly competitive as an increasing number of existing and new competitors focus on the electronic trading of credit products. Many of these competitive ventures are interested in hiring our experienced technology personnel and our qualified sales staff. Additionally, highly innovative technology firms may offer attractive employment opportunities to our technology personnel. Many of these firms have greater resources than we have and are able to offer more lucrative compensation packages. In addition, in making employment decisions, particularly in the Internet, high-technology and financial services industries, job candidates often consider the total compensation package offered, including the value of the stock-based compensation they are to receive in connection with their employment. Significant volatility in the price of our common stock may adversely affect our ability to attract or retain key employees. We cannot assure you that we will be successful in our efforts to recruit and retain the required personnel. The failure to attract new personnel or to retain and motivate our current personnel may have a material adverse effect on our business, financial condition and results of operations.

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Regulatory Risks

We operate in a highly regulated industry and we may face restrictions with respect to the way we conduct certain of our operations.

Our business is subject to increasingly extensive governmental and other regulations. These regulations are designed to protect public interests generally rather than the interests of our stockholders. The SEC, FINRA, the CFTC and other agencies extensively regulate the United States financial services industry, including most of our operations in the United States. Much of our international operations are subject to similar regulations in their respective jurisdictions, including regulations overseen by the FCA in the United Kingdom, the Swiss Financial Market Supervisory Authority in Switzerland, the Monetary Authority of Singapore, the Hong Kong Securities and Futures Commission, the Investment Industry Regulatory Organization of Canada and provincial regulators in Canada, and the Securities and Exchange Commission and Central Bank in Brazil. In addition, Xtrakter is registered as an ARM and APA with the FCA.

As a matter of public policy, these regulatory bodies are responsible for safeguarding the integrity of the securities and other financial markets and protecting the interests of investors in those markets. These regulatory bodies have broad powers to promulgate and interpret, investigate and sanction non-compliance with their laws, rules and regulations.

Most aspects of our broker-dealer and other licensed subsidiaries are highly regulated, including:

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the way we deal with our clients;

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our capital requirements;

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our financial and regulatory reporting practices;

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required record-keeping and record retention procedures;

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the licensing of our employees; and

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the conduct of our directors, officers, employees and affiliates.

We cannot assure you that we and/or our directors, officers and employees will be able to fully comply with these laws, rules and regulations. If we fail to comply with any of these laws, rules or regulations, we may be subject to censure, fines, cease-and-desist orders, suspension of our business, suspensions of personnel or other sanctions, including revocation of our membership in FINRA and registration as a broker-dealer.

Certain of our regulated subsidiaries, including our registered broker-dealer and MTF, are subject to U.S. or foreign regulations which prohibit repayment of borrowings from the us or our affiliates, paying cash dividends, making loans to us or our affiliates or otherwise entering into transactions that result in a significant reduction in regulatory net capital or financial resources, without prior notification to or approval from such subsidiary’s principal regulator. MarketAxess SEF Corporation is registered with the CFTC as a SEF and is required, among other things, to maintain sufficient financial resources to cover operating costs for at least one year.

Our authority to operate our platform in a jurisdiction is dependent on continued registration or authorization in that jurisdiction or the maintenance of a proper exemption from such registration or authorization. Our ability to comply with all applicable laws and rules is largely dependent on our compliance, credit approval, audit and reporting systems and procedures, as well as our ability to attract and retain qualified compliance, credit approval, audit and risk management personnel. Our systems and procedures may not be sufficiently effective to prevent a violation of all applicable rules and regulations. In addition, the growth and expansion of our business may create additional strain on our compliance systems, procedures and personnel and has resulted, and we expect will continue to result, in increased costs to maintain and improve these systems.

In addition, because our industry is heavily regulated, regulatory approval may be required in order to continue or expand our business activities and we may not be able to obtain the necessary regulatory approvals on a timely basis, if at all. Even if approvals are obtained, they may impose restrictions on our business or we may not be able to continue to comply with the terms of the approvals or applicable regulations. The implementation of unfavorable regulations or unfavorable interpretations of existing regulations by courts or regulatory bodies could require us to incur significant compliance costs or cause the development or continuation of business activities in affected markets to become impractical. For a further description of the regulations which may limit our activities, see “Item 1. Business—Government Regulation.”

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Some of our subsidiaries are subject to regulations regarding changes in control of their ownership. These regulations generally provide that regulatory approval must be obtained in connection with any transaction resulting in a change in control of the subsidiary, which may include changes in control of MarketAxess. As a result of these regulations, our future efforts to sell shares or raise additional capital may be delayed or prohibited in circumstances in which such a transaction would give rise to a change in control as defined by the applicable regulatory body.

Our business and the trading businesses of many of our clients are subject to increasingly extensive government and other regulation, which may affect our trading volumes and increase our cost of doing business.

The financial services industry, in general, is heavily regulated. Proposals for legislation further regulating the financial services industry are continually being introduced in the United States Congress, in state legislatures and by foreign governments. The government agencies that regulate us continuously review legislative and regulatory initiatives, may adopt new or revised laws and regulations and have broad powers to investigate and enforce compliance and punish noncompliance with their rules, regulations and industry standards of practice. In light of recent conditions in the global financial markets and economy, regulators have increased their focus on the regulation of the financial services industry. We are unable to predict which of these proposals will be implemented or in what form, or whether any additional or similar changes to statutes or regulations, including the interpretation or implementation thereof, will occur in the future. Any such action could affect us in substantial and unpredictable ways and could have an adverse effect on our business, financial condition and results of operations.

Our business and that of our clients are also affected by the policies adopted by the Federal Reserve and international central banking authorities, which may affect the credit quality of our customers or increase the cost for our customers to trade the instruments on our platform. In addition, such changes in monetary policy may directly impact our cost of funds for capital raising and investment activities and may impact the value of financial instruments we hold. Changes in domestic and international monetary policy are beyond our control and are difficult to predict.

In addition, regulatory bodies in Europe have recently developed new rules for the fixed-income markets. MiFID II and MiFIR were implemented in January 2018 and introduced significant changes in market structure designed to: (i) enhance pre- and post-trade transparency for fixed income instruments with the scope of requirements calibrated for liquidity, (ii) increase and enhance post-trade reporting obligations with a requirement to submit post-trade data to ARMs, (iii) ensure trading of certain derivatives occurs on regulated trading venues and (iv) establish a consolidated tape for trade data. MiFID II and MiFIR may have an adverse effect on our operations or our ability to provide our electronic trading platform in a manner that can successfully compete against other types of regulated and non-regulated venues for the fixed-income trading needs of our clients. In addition, MiFID II has caused us to expend significantly more compliance, business and technology resources, incur additional operational costs and create additional regulatory exposure for our trading and post-trade businesses. We cannot predict the extent to which any of these new regulations or future regulatory changes will impact our European business and operations, but they may have an adverse effect on our business, financial condition and results of operations.

Any changes in laws or regulations or in governmental policies could have a material adverse effect on our business, financial condition and results of operations. Our industry has been and is subject to continuous regulatory changes and may become subject to new regulations or changes in the interpretation or enforcement of existing regulations, which could require us to incur significant compliance costs or cause the development and growth of impacted markets to become impractical. For example, the Volcker Rule section of the Dodd-Frank Act bans proprietary trading by banks and their affiliates, which could adversely affect our bank-affiliated broker-dealer clients’ ability to make markets in a variety of fixed-income securities, thereby negatively impacting the level of liquidity and pricing available on our trading platform. Other regulatory initiatives include Basel III, a global regulatory standard on bank capital adequacy designed to strengthen bank capital requirements and liquidity in most of the world’s major economies by 2019. The implementation of these rules could restrict the ability of our bank-affiliated broker-dealer clients to raise additional capital or use existing capital for trading purposes, which might cause them to trade less on our platform. In addition, as we expand our business into new markets, it is likely that we will be subject to additional laws, rules and regulations. We cannot predict the extent to which any future regulatory changes may adversely affect our business and operations.

Our disclosed trading system has not been subjected to regulation as an alternative trading system under Regulation ATS. A determination by the SEC to treat our disclosed trading platform as an alternative trading system subject to Regulation ATS would subject us to additional reporting obligations, compliance and operational costs and other limitations on the conduct of our business, many of which could be material. If we offer a trading methodology subject to oversight under Regulation ATS in the future, such as a central limit order book for the trading of bonds or other similar automated matching services, these protocols would likely be regulated as an alternative trading system subject to Regulation ATS, which could increase our compliance and operational costs and create additional regulatory exposure for our businesses.

The activities and consequences described above may result in significant distractions to our management and could have a material adverse effect on our business, financial condition and results of operations.

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The extensive regulation of our business means we have ongoing exposure to potentially significant costs and penalties.

Our businesses are subject to regulation by governmental and self-regulatory organizations in the jurisdictions in which we operate around the world. Many of these regulators, including U.S. and non-U.S. government agencies and self-regulatory organizations, as well as state securities commissions in the U.S., are empowered to bring enforcement actions and to conduct administrative proceedings and examinations, inspections, and investigations, which may result in costs, penalties, fines, enhanced oversight, additional requirements, restrictions, or limitations, and censure, suspension, or expulsion. Self-regulatory organizations such as FINRA and the National Futures Association (“NFA”), along with statutory bodies such as the SEC, the CFTC, and the FCA, and other international regulators, require strict compliance with their rules and regulations.

Firms in the financial services industry have experienced increased scrutiny in recent years, and penalties, fines and other sanctions sought by regulatory authorities, including the SEC, the CFTC, FINRA, the NFA, state securities commissions and state attorney generals in the U.S., and the FCA in the U.K. and other international regulators, have increased accordingly. Accordingly, we face the risk of regulatory intervention, investigations and proceedings, any of which could involve extensive scrutiny of our activities and result in significant fines and liability. Any of these developments would require significant time and financial resources and could adversely affect our reputation, financial condition and operating results.

Legal Risks

In the event of employee error or misconduct, our business may be harmed.

Employee misconduct or error could expose us to significant liability, financial losses, regulatory sanctions and reputational harm. Misconduct or error by employees could include engaging in improperly using our confidential information or the confidential or personal information of our clients or engaging in improper or unauthorized activities or transactions.

Our employees could carry out improper activities on behalf of our clients, or use proprietary client or company information for personal or other improper or illegal uses. Employee errors also expose us to the risk of material loss until such errors are detected and unauthorized transactions or improper activities are reversed.

Errors and misconduct by our current or former employees could cause us to suffer financial losses, regulatory sanctions and reputational harm. The precautions we take to monitor and prevent employee errors and misconduct may not be effective in all cases.

We are subject to the risks of litigation and securities laws liability.

Many aspects of our business, and the businesses of our clients, involve substantial risks of liability. Dissatisfied clients may make claims against us regarding quality of trade execution, improperly settled trades, resolution of trade error claims, system failures, failure to protect to their confidential or personal information, mismanagement or even fraud. We may become subject to these claims as the result of delays, failures or malfunctions of our electronic trading platform and services provided by us. We could incur significant legal expenses defending claims, even those without merit. An adverse resolution of any lawsuits or claims against us could have a material adverse effect on our business, financial condition and results of operations.

Risks Related to Growing our U.S. and International Operations

We may face increasing economic and regulatory challenges in our growing international operations that we may not be able to meet in the future.

We operate an electronic trading platform in Europe, Latin America and Asia and we may further expand our operations throughout these and other regions. We have invested significant resources in our foreign operations and the increasing globalization of our platform and services. However, there are certain risks inherent in doing business in international markets, particularly in the financial services industry, which is heavily regulated in many jurisdictions. These risks include:

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difficulty in obtaining the necessary regulatory approvals for planned expansion, if at all, and the possibility that any approvals that are obtained may impose restrictions on the operation of our business;

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the inability to manage and coordinate the various regulatory requirements of multiple jurisdictions that are constantly evolving and subject to unexpected change;

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difficulties in staffing and managing foreign operations;

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less developed technological infrastructures and generally higher costs, which could result in lower client acceptance of our services or clients having difficulty accessing our trading platform;

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fluctuations in exchange rates;

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reduced or no protection for intellectual property rights;

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seasonal reductions in business activity; and

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potentially adverse tax consequences.

Our international operations are also subject to the legal, economic and market risks associated with geopolitical uncertainties in other regions of the world, including but not limited to the risk of war, inter and intra national conflict, economic crises and terrorism.

In addition, we must comply with the laws, regulations and registration rules of foreign governments and regulatory bodies for each country in which we conduct business. For example, MiFID II and MiFIR were implemented by regulatory bodies in Europe in January 2018. We cannot predict the extent to which any of these new regulations or future regulatory changes may impact our European business and operations, but they may cause us to expend significantly more compliance, business and technology resources, incur additional operational costs and create additional regulatory exposure.

We cannot predict what future actions that the regulatory bodies that supervise our business might take, or the impact that any such actions may have on our business. In addition, Brexit could lead to legal uncertainty and potentially divergent national laws and regulations as the U.K. determines which E.U. laws to replace or replicate. Our compliance with these changing laws and regulations may be costly and time-consuming and may have a material adverse effect on our clients’ trading activities on our platform.

Further, we may face unexpected challenges in our international operations due to global competitors, established local markets, and economic and political instability. Our inability to manage these risks effectively could adversely affect our business and limit our ability to expand our international operations, which could have a material adverse effect on our business, financial condition and results of operations.

Our growth initiatives may place significant strain on management and other resources.

We have significantly expanded our business activities and operations over the last several years. Continued growth, both domestic and international, will require further investment in management and new personnel, infrastructure and compliance systems. The expansion of our international operations involves risks that may have an adverse effect on our business and operations, such as the challenge of effectively managing and staffing our international operations, complying with increased and varied regulatory requirements and entering new markets. In addition, we may incur substantial development, sales and marketing expenses and expend significant management effort to create a new product or service, and the period before the product or service is successfully developed, introduced and adopted may extend over many months or years. Even after incurring these costs, our clients maydetermine that they do not need or prefer the product or service.

We may not be able to manage our growth efficiently, which could result in our expansion costs increasing at a faster rate than our revenues and distracting management from our core business and operations. If we cannot successfully implement the necessary processes to support and manage new initiatives, our business, financial condition and results of operations may suffer.

We conduct operations in several different countries outside the U.S., most notably the U.K., and substantial portions of our revenues, expenses, assets and liabilities are denominated in non U.S. dollar currencies. Since our consolidated financial statements are presented in U.S. dollars, we must translate revenues, income and expenses, as well as assets and liabilities, into U.S. dollars at exchange rates in effect during or at the end of each reporting period. Accordingly, increases or decreases in the value of the U.S. dollar against the other currencies will affect our net operating revenues, operating income and the value of balance sheet items denominated in foreign currencies.

Although we have entered into foreign currency forward contracts to hedge our net investment in our U.K. subsidiaries and may enter into additional hedging transactions in the future to help mitigate our foreign exchange risk exposure, these hedging arrangements may not be effective, particularly in the event of inaccurate forecasts of the levels of our non-U.S. denominated assets and liabilities. Accordingly, if there are adverse movements in exchange rates, we may suffer significant losses, which would adversely affect our operating results and financial condition.

Our business is dependent upon the availability of adequate funding and regulatory capital under applicable regulatory requirements. Although we believe that our available cash resources and borrowing capacity under our credit agreement are sufficient to meet our presently anticipated liquidity needs and capital expenditure requirements for at least the next 12 months, we may in the future need to raise additional funds to, among other things:

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support more rapid growth of our business;

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develop new or enhanced services and products;

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fund operating losses;

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respond to competitive pressures;

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acquire complementary companies or technologies;

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enter into strategic alliances;

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increase the regulatory net capital necessary to support our operations; or

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respond to unanticipated or changing capital requirements.

The growth of our Open Trading™ protocols, in particular, is dependent on the willingness of our customers and counterparties to engage in transactions with us and any perceived issues with our capital levels or access to funding could have a material adverse effect on business. In addition, our liquidity could be impaired due to circumstances that we may be unable to control, such as a general market disruption or an operational problem that affects our trading customers or counterparties, other third parties or us.

All or part of any debt financing would likely be pursuant to the terms of our credit agreement with JPMorgan Chase & Co., which includes restrictive covenants with respect to dividends, issuances of additional capital and other financial and operational matters related to our business. For a detailed discussion of the risks associated with our credit agreement, see the Risk Factor captioned “Our credit agreement contains restrictive and financial covenants that could limit our operating flexibility, and we may incur additional debt in the future that may include similar or additional restrictions.”

In the future, we may not be able to obtain additional financing, if needed, in amounts or on terms acceptable to us, if at all. If sufficient funds are not available or are not available on terms acceptable to us, our ability to fund our expansion, take advantage of acquisition opportunities, develop or enhance our services or products, or otherwise respond to competitive pressures would be significantly limited. These limitations could have a material adverse effect on our business, financial condition and results of operations.

Our credit agreement contains restrictive and financial covenants that could limit our operating flexibility, and we may incur additional debt in the future that may include similar or additional restrictions.

We are party to a credit agreement with JPMorgan Chase & Co. that provides for revolving loans and letters of credit up to an aggregate of $100.0 million. Subject to the satisfaction of certain specified conditions, we are permitted to upsize the borrowing capacity of the credit agreement by an additional $50.0 million. Our credit agreement contains certain covenants that, among other things, restrict our ability to take certain actions, even if we believe them to be in our best interests. These covenants restrict or prohibit, among other things, our ability to:

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incur or guarantee additional debt;

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create or incur liens;

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change our line of business;

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sell or transfer assets;

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make certain investments or acquisitions;

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pay dividends or distributions, redeem or repurchase our equity or make certain other restricted payments;

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consummate a merger or consolidation;

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enter into certain swap, derivative or similar transactions;

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enter into certain transactions with affiliates; and

•

incur restrictions on our ability to grant liens or, in the case of subsidiaries, pay dividends or other distributions.

We are also required by our credit agreement to maintain a maximum consolidated leverage ratio, a minimum consolidated interest coverage ratio and a minimum consolidated adjusted EBITDA level. We cannot assure you that we will be able to meet these requirements or satisfy these covenants in the future. A breach of any of these covenants or the inability to comply with the required financial covenants could result in an event of default under the credit agreement. If any such event of default occurs, the lender under the credit agreement could elect to declare all amounts outstanding and accrued and unpaid interest under the credit agreement to be immediately due and payable, and could foreclose on the assets securing the credit agreement. The lender would also have the right in these circumstances to terminate any commitments it has to provide further credit extensions. We may incur other indebtedness in the future that may contain financial or other covenants more restrictive than those applicable to the credit agreement.

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Risks Related to our Internal Controls

As a public company, we are subject to certain financial and corporate governance requirements that may be difficult for us to satisfy and may divert management’s attention from our business.

We are subject to the requirements of Section 404 of the Sarbanes-Oxley Act of 2002 (“SOX”) and the related SEC rules and regulations that call for our management to conduct an annual assessment and report on the effectiveness of our internal controls over financial reporting. Our independent registered public accounting firm must also issue an annual report addressing the operating effectiveness of our internal controls over financial reporting.

While our internal controls over financial reporting currently meet the standards set forth in SOX, failure to maintain an effective internal control environment could have a material adverse effect on our business, financial condition and results of operations. We cannot be certain of our ability to continue to comply with the requirements of SOX. If we are unable to continue to comply with the requirements of SOX in an efficient manner, we may be subject to regulatory action. In addition, in the event that we identify a material weakness, there can be no assurance that we would be able to remediate such material weakness in an efficient manner. Moreover, if we are unable to assert that our internal control over financial reporting is effective in any future period (or if our auditors are unable to issue an opinion on the effectiveness of our internal controls), we could suffer reputational harm and incur significant expenses to restructure our internal controls over financial reporting, which may have a material adverse effect on us.

Risks Related to Our Common Stock

Market volatility and future sales of our shares by significant stockholders may cause our stock price and the value of your investment to decline.

The market price of our common stock may be significantly affected by volatility in the markets in general. The market price of our common stock likely will continue to fluctuate in response to factors including the following:

Most of these factors are beyond our control. In addition, the stock markets in general, including the NASDAQ Global Select Market, have experienced and continue to experience significant price and volume fluctuations. These fluctuations have resulted in volatility in the market prices of securities for companies such as ours that often has been unrelated or disproportionate to changes in the operating performance of the affected companies. These broad market and industry fluctuations may affect adversely the market price of our common stock regardless of our operating performance.

In addition, future sales of our common stock, or the perception of potential future sales, may adversely impact the market price of our common stock. If any one or more of our existing stockholders were to sell a large number of shares, the market price of our common stock could be negatively affected. Also, if we issue a large number of shares of our common stock in connection with a public offering, future acquisition, strategic alliance, third-party investment and private placement or otherwise, the market price of our common stock could decline considerably. Furthermore, our stockholders may be diluted by such future sales.

We may decrease or cease paying dividends on our common stock in the future.

We initiated a regular quarterly dividend on our common stock in 2009. However, there is no assurance that we will continue to pay any dividends to holders of our common stock in the future or, if we continue paying dividends, that such dividends will be paid at the rate at which they were paid in prior periods. If we were to decrease the dividend rate or cease paying dividends, investors may need to rely on the sale of their common stock after price appreciation, which may never occur, as the primary or only way to realize any future gains on their investment.

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If securities analysts do not publish research or reports about our business or if they downgrade our common stock, the price of our common stock could decline.

The trading market for our common stock relies in part on the research and reports that industry or financial analysts publish about us or our business. These analysts work independently of us. If one or more analysts who cover us downgrade our stock, our stock price could decline rapidly. If one or more of these analysts cease coverage of our company, we could lose visibility in the market, which in turn could cause our stock price to decline.

Provisions in our organizational documents and Delaware law might discourage, delay or prevent a change of control of our company or changes in our management, and therefore, depress the trading price of our common stock.

Provisions of our certificate of incorporation and bylaws may make it substantially more difficult for a third party to acquire control of us and may prevent changes in our management, including provisions that:

•

prevent stockholders from calling special meetings;

•

allow the directors to amend the bylaws without stockholder approval; and

•

set forth advance notice procedures for nominating directors and submitting proposals for consideration at stockholders’ meetings.

Provisions of Delaware law may also inhibit potential acquisition bids for us or prevent us from engaging in business combinations. In addition, we have a severance agreement with one employee and a change of control severance plan that could require an acquirer to pay a higher price. Either collectively or individually, these provisions may prevent holders of our common stock from benefiting from what they may believe are the positive aspects of acquisitions and takeovers, including the potential realization of a higher rate of return on their investment from these types of transactions.

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Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

Our corporate headquarters and principal U.S. offices are located in New York, New York, where we lease approximately 57,000 square feet under leases expiring between April 2018 and February 2022. We also collectively lease approximately 21,000 square feet for our other office locations in the U.S., United Kingdom, Brazil, Hong Kong and Singapore under various leases expiring between April 2018 and December 2033. During 2016, we entered into a fifteen-year lease agreement for our new global headquarters in New York City. We expect to vacate all of the office space we currently lease in New York City andrelocate our headquarters to approximately 83,000 square feet of newly built office space at 55 Hudson Yards upon the building’s completion in late 2018.

Item 3. Legal Proceedings.

In the normal course of business, we and our subsidiaries included in the consolidated financial statements may be involved in various lawsuits, proceedings and regulatory examinations. We assess liabilities and contingencies in connection with outstanding legal proceedings, if any, utilizing the latest information available. For matters where it is probable that we will incur a material loss and the amount can be reasonably estimated, we would establish an accrual for the loss. Once established, the accrual would be adjusted to reflect any relevant developments. When a loss contingency is not both probable and estimable, we would not establish an accrual.

Based on currently available information, the outcome of our outstanding matters is not expected to have a material adverse impact on our financial position. It is not presently possible to determine our ultimate exposure to these matters and there is no assurance that the resolution of the outstanding matters will not significantly exceed any reserves accrued by us.

Our common stock trades on the NASDAQ Global Select Market under the symbol “MKTX”. The range of closing price information for our common stock, as reported by NASDAQ, was as follows:

2017:

High

Low

January 1, 2017 to March 31, 2017

$

197.74

$

150.18

April 1, 2017 to June 30, 2017

$

207.93

$

178.07

July 1, 2017 to September 30, 2017

$

207.84

$

176.20

October 1, 2017 to December 31, 2017

$

202.91

$

173.05

2016:

January 1, 2016 to March 31, 2016

$

126.29

$

101.77

April 1, 2016 to June 30, 2016

$

145.40

$

120.86

July 1, 2016 to September 30, 2016

$

173.34

$

143.59

October 1, 2016 to December 31, 2016

$

171.02

$

145.53

On February 16, 2018, the last reported closing price of our common stock on the NASDAQ Global Select Market was $201.40.

Holders

There were 23 holders of record of our common stock as of February 16, 2018.

Dividend Policy

During 2017, 2016 and 2015, we paid quarterly cash dividends of $0.33 per share, $0.26 per share and $0.20 per share, respectively. Any future declaration and payment of dividends will be at the sole discretion of our Board of Directors. The Board of Directors may take into account such matters as general business conditions, our financial results, capital requirements, contractual obligations, legal and regulatory restrictions on the payment of dividends to our stockholders or by our subsidiaries to their respective parent entities, and such other factors as the Board of Directors may deem relevant.

During the three months ended December 31, 2017, we repurchased the following shares of common stock:

Period

Total Number of Shares Purchased

Average Price Paid per Share

Total Number of Shares Purchased as Part of Publicly Announced Plans and Programs

Dollar Value of Shares That May Yet Be Purchased Under the Plans and Programs

(In thousands)

October 1, 2017 - October 31, 2017

39,812

$

177.31

12,000

$

97,760

November 1, 2017 - November 30, 2017

70,860

$

191.39

10,500

95,873

December 1, 2017 - December 31, 2017

10,173

$

198.18

10,000

93,891

120,846

$

187.32

32,500

During the three months ended December 31, 2017, we repurchased 120,846 shares of common stock. The repurchases included 88,346 shares surrendered by employees to us to satisfy the withholding tax obligations upon the exercise of stock options and vesting of restricted shares and 32,500 shares repurchased in connection with our share repurchase program.

In January 2016, our Board of Directors authorized a two-year share repurchase program for up to $25.0 million of our common stock. In October 2016, our Board of Directors approved a $50.0 million increase in the size of the current share repurchase program. In September 2017, the existing share repurchase plan was terminated and our Board of Directors authorized a new fifteen-month share repurchase program for up to $100 million commencing in October 2017. Shares repurchased under each program will be held in treasury for future use.

STOCK PERFORMANCE GRAPH

The following graph shows a comparison from December 31, 2012 through December 31, 2017 of the cumulative total return for (i) our common stock, (ii) the NASDAQ Composite Index and (iii) the Dow Jones US Financial Services Index. The performance graph and related information shall not be deemed “soliciting material” or to be “filed” with the SEC, nor shall such information be incorporated by reference into any future filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, each as amended, except to the extent that the we specifically incorporate it by reference into such filing.

The figures in this graph assume an initial investment of $100 in our common stock and in each index on December 31, 2012, and that all quarterly dividends were reinvested. The returns illustrated below are based on historical results during the period indicated and should not be considered indicative of future stockholder returns.

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Item 6. Selected Financial Data.

The selected statements of operations data for each of the years ended December 31, 2017, 2016 and 2015 and the selected balance sheet data as of December 31, 2017 and 2016 have been derived from our audited financial statements included elsewhere in this Annual Report on Form 10-K. The selected statements of operations data for the years ended December 31, 2014 and 2013, and the balance sheet data as of December 31, 2015, 2014 and 2013 have been derived from our audited financial statements not included in this Annual Report on Form 10-K.

Information service revenues include data licensed to our broker-dealer clients, institutional investor clients and data-only subscribers, as well as professional consulting services, technology software licenses and maintenance and support services.

(3)

Post-trade service revenues include revenue from trade matching and regulatory transaction reporting services through Xtrakter, which was acquired in February 2013.

(4)

Other revenues consist primarily of telecommunications line charges to broker-dealer clients, realized and unrealized gains or losses on trading security investments and other miscellaneous revenues.

(5)

Clearing costs consist of fees charged by third-party clearing brokers for the clearing and settlement of matched principal trades.

(6)

In October 2013, we sold Greenline Financial Technologies, Inc. for $11.0 million and recognized a gain on the sale, net of a tax benefit, of $7.6 million.

(7)

Working capital is defined as current assets minus current liabilities. Current assets consist of cash and cash equivalents, investments, accounts receivable and prepaid and other expenses (excludes cash provided as collateral). Current liabilities consist of accrued employee compensation, income and other tax liabilities, deferred revenue, and accounts payable, accrued expenses and other liabilities.

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

You should read the following discussion and analysis of our financial condition and results of operations in conjunction with “Selected Financial Data” and our consolidated financial statements and related notes included elsewhere in this Annual Report on Form 10-K. In addition to historical information, this discussion and analysis contains forward-looking statements relating to future events and the future performance of MarketAxess that are based on our current expectations, assumptions, estimates and projections about us and our industry. These forward-looking statements involve risks and uncertainties. Our actual results and timing of various events could differ materially from those anticipated in such forward-looking statements as a result of a variety of factors, as more fully described in this section, in “Item 1A. Risk Factors” and elsewhere in this Annual Report on Form 10-K. We undertake no obligation to update publicly any forward-looking statements for any reason, even if new information becomes available or other events occur in the future.

Executive Overview

MarketAxess operates a leading electronic trading platform that enables fixed-income market participants to efficiently trade corporate bonds and other types of fixed-income instruments using our patented trading technology. Over 1,300 institutional investor and broker-dealer firms are active users of our trading platform, accessing global liquidity in U.S. high-grade corporate bonds, emerging markets and high-yield bonds, European bonds, U.S. agency bonds, municipal bonds, credit default swaps and other fixed-income securities. Through our Open Trading™ protocols, we execute trades in certain bonds between and among institutional investor and broker-dealer clients in an all-to-all trading environment on a matched principal basis. We also offer a number of trading-related products and services, including: market data to assist clients with trading decisions; connectivity solutions that facilitate straight-through processing; technology services to optimize trading environments; and execution services for exchange-traded fund managers and other clients. Through our Trax® division, we also offer a range of pre- and post-trade services, including trade matching, trade publication, regulatory transaction reporting, and market and reference data across a range of fixed-income and other products.

Our platform’s innovative technology solutions are designed to increase the number of potential trading counterparties on our electronic trading platform and create a menu of solutions to address different trade sizes and bond liquidity characteristics. Our traditional request-for-quote model allows our institutional investor clients to simultaneously request competing, executable bids or offers from our broker-dealer clients and execute trades with the broker-dealer of their choice from among those that choose to respond. Our Open Trading™ protocols complement our request-for-quote model by increasing the number of potential counterparties and improving liquidity by allowing all participants to interact anonymously in an all-to-all trading environment. Our platform also provides our broker-dealer clients a solution that enables them to efficiently reach our institutional investor clients for the distribution and trading of bonds.

The majority of our revenues are derived from commissions for trades executed on our platform and distribution fees that are billed to our broker-dealer clients on a monthly basis. We also derive revenues from information and post-trade services, technology products and services, investment income and other income. Our expenses consist of employee compensation and benefits, depreciation and amortization, technology and communication expenses, professional and consulting fees, occupancy, marketing and advertising and other general and administrative expenses.

Our objective is to provide the leading global electronic trading platform for fixed-income securities, connecting broker-dealers and institutional investors more easily and efficiently, while offering a broad array of information, trading and technology services to market participants across the trading cycle. The key elements of our strategy are:

•

to innovate and efficiently add new functionality and product offerings to the MarketAxess platform that we believe will help to increase our market share with existing clients, as well as to expand our client base;

•

to leverage our existing client network and technology to increase the number of potential counterparties and improve liquidity by developing and deploying a wide range of electronic trading protocols to complement our traditional request-for-quote model and allowing broker-dealers and institutional investors to interact in our all-to-all Open TradingTM environment;

to continue building our existing service offerings so that our electronic trading platform is more fully integrated into the workflow of our broker-dealer and institutional investor clients and to continue to add functionality to allow our clients to achieve a fully automated end-to-end straight-through processing solution (automation from trade initiation to settlement);

•

to add new content and analytical capabilities to BondTicker® and expand Axess All®, the first intra-day trade tape for the European fixed income market, and our other data service offerings provided by Trax® to improve the value of the information we provide to our clients; and

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•

to continue to increase and supplement our internal growth by entering into strategic alliances, or acquiring businesses or technologies that will enable us to enter new markets, provide new products or services, or otherwise enhance the value of our platform to our clients.

Critical Factors Affecting Our Industry and Our Company

Economic, Political and Market Factors

The global fixed-income securities industry is risky and volatile and is directly affected by a number of economic, political and market factors that may result in declining trading volume. These factors could have a material adverse effect on our business, financial condition and results of operations. These factors include, among others, credit market conditions, the current interest rate environment, including the volatility of interest rates and investors’ forecasts of future interest rates, economic and political conditions in the United States, Europe and elsewhere, and the consolidation or contraction of our broker-dealer clients.

In 2017, our business faced a challenging trading environment which we attribute to a number of factors, including low volatility, low credit spreads and a continuation of accommodative monetary policies by several major central banks, including the Federal Reserve and the European Central Bank. These monetary policies have resulted in historically low levels of volatility and interest rates across most of the fixed income markets, resulting in a trading emphasis on new bond issues rather than the secondary markets in which we operate. The lack of volatility in 2017 particularly weighed on high-yield trading activity, while emerging market trading volumes benefitted from the global search for yield. The global credit markets have also faced structural issues in recent years, such as trading limits imposed by the Volcker Rule, increased bank capital requirements under Basel III and the quantitative easing program of the European Central Bank.

Competitive Landscape

The global fixed-income securities industry generally, and the electronic financial services markets in which we engage in particular, are highly competitive, and we expect competition to intensify in the future. Sources of competition for us will continue to include, among others, bond trading conducted directly between broker-dealers and their institutional investor clients over the telephone or electronically and other multi-dealer or all-to-all trading platforms. Competitors, including companies in which some of our broker-dealer clients have invested, have developed or acquired electronic trading platforms or have announced their intention to explore the development of electronic platforms or information networks that may compete with us.

In general, we compete on the basis of a number of key factors, including, among others, the liquidity provided on our platform, the magnitude and frequency of price improvement enabled by our platform, total transaction costs and the quality and speed of execution. We believe that our ability to grow volumes and revenues will largely depend on our performance with respect to these factors.

Our competitive position is also enhanced by the familiarity and integration of our broker-dealer and institutional investor clients with our electronic trading platform and other systems. We have focused on the unique aspects of the credit markets we serve in the development of our platform, working closely with our clients to provide a system that is suited to their needs.

Regulatory Environment

Our industry has been and is subject to continuous regulatory changes and may become subject to new regulations or changes in the interpretation or enforcement of existing regulations, which could require us to incur significant costs.

Following the global financial crisis and other recent events in the financial industry, governments and regulators in both the United States and Europe called for increased regulation and transparency in the over-the-counter markets. As a result, the Dodd-Frank Act was enacted in 2010 and, among other things, mandated the clearing of certain derivative instruments (“swaps”) through regulated central clearing organizations and mandatory trading of those instruments through either regulated exchanges or swap execution facilities (“SEFs”), in each case, subject to certain key exceptions.

Various rules promulgated since the financial crisis could also adversely affect our bank-affiliated broker-dealer clients’ ability to make markets in a variety of fixed-income securities, thereby negatively impacting the level of liquidity and pricing available on our trading platform. For example, while the Volcker Rule does not apply directly to us, the Volcker Rule bans proprietary trading by banks and their affiliates. In addition, enhanced leverage ratios applicable to large banking organizations in the U.S. and Europe require such organizations to strengthen their balance sheets and may limit their ability or willingness to make markets on our trading platform. We cannot predict the extent to which these rules or any future regulatory changes may adversely affect our business and operations.

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Following President Trump’s election in November 2016, his administration pursued a path of financial deregulation, including by signing an executive order that requires the Treasury Department to review the provisions of the Dodd-Frank Act. As a result, the Treasury Department has begun a process of reviewing existing U.S. capital markets regulations, including the Volcker Rule, and has issued a report with recommendations to improve corporate bond liquidity. In 2017, the SEC established a Fixed Income Market Structure Advisory Committee in order to provide the SEC with diverse perspectives on the structure and operations of the U.S. fixed income markets, as well as advice and recommendations on matters related to fixed income market structure.

In Europe, MiFID II and MiFIR were implemented in January 2018 and introduced significant changes in market structure designed to: (i) enhance pre- and post-trade transparency for fixed income instruments with the scope of requirements calibrated for liquidity, (ii) increase and enhance post-trade reporting obligations with a requirement to submit post-trade data to ARMs, (iii) ensure trading of certain derivatives occurs on regulated trading venues and (iv) establish a consolidated tape for trade data. MiFID II has caused us to expend significantly more compliance, business and technology resources, incur additional operational costs and create additional regulatory exposure for our trading and post-trade businesses. While we generally believe the net impact of the rules and regulations may be positive for our businesses, unintended consequences of the rules and regulations may adversely affect us in ways yet to be determined.

In March 2017, the U.K. notified the European Council of its intention to leave the E.U. By invoking Article 50 of the Lisbon Treaty, the U.K. is currently set to leave the European Union in March 2019. Depending on the terms agreed between E.U. member states and the U.K. as part of the exit negotiations, our U.K. subsidiaries may not be able to rely on the existence of a “passporting” regime that allows immediate access to the single E.U. market. Accordingly, we have begun the process of establishing one or more new regulated subsidiaries in the E.U. in order to provide our trading platform and certain post-trade services to clients in the E.U. following Brexit.

Rapid Technological Changes

We must continue to enhance and improve our electronic trading platform. The electronic financial services industry is characterized by increasingly complex systems and infrastructures and new business models. Our future success will depend on our ability to enhance our existing products and services, develop and/or license new products and technologies that address the increasingly sophisticated and varied needs of our existing and prospective broker-dealer and institutional investor clients and respond to technological advances and emerging industry standards and practices on a cost-effective and timely basis. We have been issued 13 patents covering our most significant trading protocols and other aspects of our trading system technology.

Trends in Our Business

The majority of our revenues are derived from commissions for transactions executed on our platform between and among our institutional investor and broker-dealer clients and monthly distribution fees. We believe that there are five key variables that impact the notional value of such transactions on our platform and the amount of commissions and distribution fees earned by us:

•

the number of participants on our platform and their willingness to originate transactions through the platform;

•

the number of institutional investor and broker-dealer clients on the platform and the frequency and competitiveness of the price responses they provide on our platform;

•

the number of markets for which we make trading available to our clients;

•

the overall level of activity in these markets; and

•

the level of commissions that we collect for trades executed through the platform.

We believe that overall corporate bond market trading volume is affected by various factors including the absolute levels of interest rates, the direction of interest rate movements, the level of new issues of corporate bonds and the volatility of corporate bond spreads versus U.S. Treasury securities. Because a significant percentage of our revenue is tied directly to the volume of securities traded on our platform, it is likely that a general decline in trading volumes, regardless of the cause of such decline, would reduce our revenues and have a significant negative impact on profitability.

Commission Revenue

Commissions are generally calculated as a percentage of the notional dollar volume of bonds traded on our platform and vary based on the type, size, yield and maturity of the bond traded. Under our transaction fee plans, bonds that are more actively traded or that have shorter maturities are generally charged lower commissions, while bonds that are less actively traded or that have longer maturities generally command higher commissions.

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For trades that we execute between and among institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller, we earn our commission through the difference in price between the two trades. Distribution fees include any unused monthly fee commitments under our variable fee plans.

U.S. High-Grade Corporate Bond Commissions. Our U.S. high-grade corporate bond fee plans generally incorporate variable transaction fees and fixed distribution fees billed to our broker-dealer clients on a monthly basis. Certain dealers participate in fee programs that do not contain monthly distribution fees and instead incorporate additional per transaction execution fees and minimum monthly fee commitments. Under these fee plans, we electronically add the transaction fee to the spread quoted by the broker-dealer client. The U.S. high-grade transaction fee is generally designated in basis points in yield and, as a result, is subject to fluctuation depending on the duration of the bond traded. The average U.S. high-grade fees per million may vary in the future due to changes in yield, years-to-maturity and nominal size of bonds traded on our platform.

Other Credit Commissions. Other credit includes Eurobonds, emerging markets bonds, high-yield bonds and municipal bonds. Commissions for other credit products generally vary based on the type of the instrument traded using standard fee schedules. During the third quarter of 2017, we changed our high-yield fee plan s